屏蔽泵特点（英文）
The Canned Pump is a centrifugal pump, close coupled to a Canned Motor in such a way that there is no dynamic shaft seal, no couplings and no ball bearings. The motor is cooled by the pumped liquid and the sleeve type Bearings are lubricated by the same liquid. This eliminates the need for external lubrication.
The stator of the driving motor, which is usually three phase squirrel cage induction motor, which is hermetically contained in a stator containment that consist of an external frame tube, out board & inboard end plates and the internal cylinder liner. The rotor which is welded on the shaft, is also encapsulated with a non magnetic liner. Both stator liner (Stator Can) and rotor liner (rotor can) are seal welded at both ends, and does not allow any part of the motor to be exposed to external environment or internal pumped liquid.
Leak Free Pumping For Safer Future
With wide experience in solving pumping problems, we can provide you with a range of sealless pumps, sealless canned motor pumps, centrifugal pumps with exceptional operating reliability.
Dynamic canned motor pumps are highly efficient due to reduced life cycle operating cost, zero fugitive emissions, eliminating environmental pollution risks, and allowing very safe pumping of fluids without wastage of valuable, hazardous, even explosive fluids, due to sealless construction and other unique features.
The wide range of models available, allows top quality standardization. High efficiency is combined with superb handling and ease of installation is attributed to the experience of the dynamic team and close collaboration with large number of customers.
The uniqueness of its drive motor construction is that, there is no dynamic shaft seal, no coupling and no ball bearings. The motor is cooled by the pumped liquid and the sleeve type bearings are lubricated by the same liquid. This eliminates the need for external lubrication. The stator of the driving motor, which is usually three phase squirrel cage induction motor, is hermetically contained in a stator containment that consists of external frame tube, outboard and inboard end plates and internal cylinder liner. The rotor which is welded on the shaft, is also encapsulated with a non - magnetic liner. Both stator can and rotor can are seal welded at both ends, and does not allow any part of the motor to be exposed to external environment or internal pumped liquid. The can represents a static atmospheric seal and separates the rotor compartment from the stator compartment, such that levels of sealing of < 10 -7cc
/sec are achieved. To ensure integrity of the canning. The versatile drive system has exceptionally improved the operating limits for pressure, temperature and toxicity of the flow of the product responding to heightened safety and environment protection requirements all over the world. Dynamic canned motor pumps are flame poof and are cmri certified to EEx-d 11b T4(Ex) ds, IS: 2148-2004 AND weather proof protection : IS:12063-1987, IP-67.
Installation and Space Requirements
Dynamic canned motor pumps are characterized by extreme compactness and consequentially low space requirements, because the pump and motor form integral unit, neither base plate nor special foundations are required, our units are not at all sensitive to distortion caused by the piping, this is of special importance if heat transfer oils are to be pumped at high temperatures., this allows the pump to be installed in otherwise inaccessible places for e,g in ships and nuclear power stations. being noiseless and vibration free.
Due to more stringent health and safety regulations canned motors are beneficial replacement, if properly installed and operated, canned motor pumps render technical processes maintenance free and safe and contribute to increased productivity and reduced maintenance costs.
Design & Construction Of Dynamic Canned Motor Pump
The Canned Motor Pump Design is very simple & has all standard features of conventional centrifugal pumps.
The Pump is categorized in three sections- The Pump, the canned motor and the bearings.
The Pump is designed as per Hydraulic Institute standard. having back pull out design, keyed impellor, automatic axial thrust balancing, self venting .flanges confirming to ANSI class 150,300 std. ASA CLASS 150,,ISO-2084 PN16,IS-6392
PN16 ,API. The impellor is either enclosed or semi open type with maximum mechanical strength for high efficiency and low NPSH, back vanes are provided for reducing axial thrust, the impellor is positively locked on the shaft and cannot get loose under reverse rotation.
The temperature class of motors is class H & Class C, Insulation of the windings are provided according to the class specified and internationally sourced for compatibility with IEC Motor specification.
The Bearings are journal type and are selected for having excellent self-lubricity property, the bush bearings made of carbon graphite, silicon carbide or tungsten carbide are provided, the load capacity is also one important criteria for bearing selection. Different grades of carbon grahites are choosen for chemical resistance, low friction coefficient, high heat stability, wear resistance and good compatibility with metal sleeves.
Safety
Canned Pumps are normally designed and manufactured to have secondary Containment.
Stator liner with a back up ring works as the primary containment and the outer motor frame work as the secondary containment, the secondary containment will prevent the liquid from leaking out into atmosphere for long enough to detect the failure of the primary containment.
There are safety options available for safety equipments are available such as bearing wear indicator, dry run protection unit, thermostat embedded in the windings, RTD on recirculation line and so on.
Dynamic Canned motors are provided with option of bearing wear indicator electronic type or Mechanical Type. The LED Displays the bearing health in three zones. Green is for Good, Amber is for Not Good and Red indicator is for bad bearings, which need immediate replacement. Alarm signal is also provided along with motor tripping device incase the bearings are not replaced inspite of crossing danger zone. Since, the indication is continuous and real time, it gives the operator an idea when the maintenance work is needed. A light Indicator is also provided on the electronic device to indicate the direction of rotation of the motor, as nothing can be seen from outside the pump visually for motor inspection.
A micro thermostat embedded in the hot spots of the electrical windings will trip of f the motor on electrical overload.
Dry Run Protection device , being a current monitoring device , trips of the pump in the event of drop in the flow of liquid to unsafe limits, other conditions , such as rotor locking, cavitation , air locking ,single phasing etc. can be detected.
竭诚为您提供优质文档/双击可除英文版商务回复邀请函 篇一：邀请信及回复函英文写作 邀请信及回复 邀请信是写给合作伙伴，朋友或同事的信件。他与其他商务信件不同，一般而言邀请信往往是写给自己相对较熟悉的人，一般包括以下信息： 1．寒暄语言（视关系而定） 2．发出邀请 3．阐述活动或会议举行的时间，地点，以及与会的人物 4．再次提出邀请 5．结束语 1.words 1)invite邀请 2)formally正式地 3)sincerely真诚地 4)Lookforwardto-------盼望--------
2．sentencesstructure 1)howImissyou! 2)Ihaven’tseenyouforalongtime! 3)what’sgoingon? 4)Iformallyinvitesb.tosomeplace. 5)Thismeeting/activitywillbeheldat-----in-----------. 6)wereallyhopethatyoucouldcome. 7)Lookingforwardtoyourcoming. 8)pleasewritetomeandtellmewhetheryouwillcomeornot. 9)Yourssincerely, Keypoints: Layout:左收右寄下日期，落款位于右下脚 邀请信的回复信是对合作伙伴，朋友或同事的邀请的回复。一般包括以下信息： 1．首先对邀请表示感谢 2．明确告诉对方能不能去 3．如果不能前往一定要说明原因并道歉 4．结束语 1.words:
1)pleased/obliged/glad/happy 2)participation 3)apologize 2.sentencestructure 1)Thankyouforyourletteron----------- 2)Iamsogladtoacceptyourinvitation. 4)IamafraidthatIamimpossibletocome. 5)Iapologizeformyabsencefromthemeeting/party. 6)wishyouhaveagoodtime. 篇二：商务邀请信和回复正文 商务邀请信 DongqiangLiu,ceoRobertcorporation37xueyuanRoadhaidi anDistrictbeijingpRchinaJuly29,20XX mr.williamwatson76brooklynAvenuenewYork9,n.Y.u.s.A. Dearwatson: Robertcompany,asoneofyourdistributorsinchina,hasbee ngreatprogressinginpromotingcooperation. pleaseusethisinvitationlettertoapplyforyourVIsAtoch
节能水泵基础知识 常用水泵型号代号 LG-----高层建筑给水泵 DL------多级立式清水泵 BX-------消防固定专用水泵 ISG------单级立式管道泵 IS -------单级卧式清水泵 DA1-------多级卧式清水泵 QJ-------潜水电泵 泵型号意义：如40LG12-15;40-进出口直径(mm);LG-高层建筑给水泵(高速);12-流量(m3/h);15-单级扬程(M)。 200QJ20-108/8。200---表示机座号200;QJ---潜水电泵;20—流量20m3/h;108---扬程108M;8---级数8级。 水泵的基本构成：电机、联轴器、泵头(体)及机座(卧式)。 水泵的主要参数有：流量，用Q表示，单位是M3/H ，L/S。扬程，用H表示，单位是M。 对清水泵，必需汽蚀余量(M)参数非常重要，特别是用于吸上式供水设备时。 对潜水泵，额定电流参数(A)非常重要，特别是用于变频供水设备时。 电机的主要参数：电机功率(KW)，转速(r/min)，额定电压(V)，额定电流(A)。 B、压力容器基本知识 1、压力：压力是垂直作用于物体单位面积上的力。确切名称是压力强度，简称压强，习惯上叫做压力。压力的单位一般用大气压，在工程单位中用公斤/厘米表示，也可以用水柱或水银柱表示，国际统一单位是牛顿、帕或兆帕。1工程大气压=0.098牛顿=0.098帕=0.098兆帕=10米水柱的压强。 2、容器：容器是由曲面构成用于盛装物料的空间构件。容器大体是由：筒体、封头(端盖)、发兰、支座、接管、人孔等组成。 3、补气式、囊式供水设备罐体的总容积、可调水容积计算及水泵启动次数：
英文邀请函及回复范文 邀请函包括宴会、舞会、晚餐、聚会、婚礼等各种邀请信件，形式上大体分为两种:一种为正规的格式(formal correspondence;一种是非正式格式(informal correspondence)。 邀请信一定要将邀请的时间(年、月、日、钟点)、地点、场合写清楚，不能使接信人存在任何疑虑。 例如:“I’d like you and Bob to come to Luncheon next Friday.”这句话中所指的是哪个星期五并不明确，所以应加上具体日期, “I’d like you and Bob to come to luncheon next Friday, May the fifth.” 1. 邀请朋友共进午餐Inviting a friend to informal luncheon Dear [Zhang Ying]: Will you come to luncheon on [Friday, May the fifth], at [twelve o’clock]? My niece [Mary] is visiting us and I think you will enjoy meeting her. She is a charming, very pretty girl … and very good company! [John and Jane] will be here, and perhaps we can [give a dance] after luncheon. Do say you’ll come! Affectionately yours, Li Ming 亲爱的[张营]: 您能在[5月5日星期五中午12点钟] 来吃午饭吗? 我侄女[玛丽]正在我们家中作客，我想您会乐于见到她的。她是个漂亮而聪明的女孩子，……同她在一起是很使人高兴的![约翰和简]也到这里来，也许在饭后我们能[开个舞会]，说好，一定得来呀! 2. 邀请朋友同他们不认识的人一起共进晚餐Inviting friends to supper with the strangers Dear [Susan]: I know you are interested in [oil painting], so I’m sure you’ll be interested in [Mr. and Mrs. Lin dun]! They are coming here to supper [next Sunday night, October the twelfth], and we’d like you and [Walter] to come, too. [Mr. and Mrs. Lin Dun] are that very charming couple we met in [London] last summer. They have a wonderful collection of [oil paintings of various stages]; and I understand that Mr. Lin Dun is quite an authority on [oil painting]. I’m sure you and Walter will thoroughly enjoy and evening in their company. We’re planning supper at six; that will give us a nice long evening to talk. If I don’t hear from you before then, I’ll be expecting you on the [twelfth]! Affectionately yours, Li Ming 亲爱的[苏珊]: 我知道您对[油画]是有兴趣的，所以我相信您对林顿夫妇也会感兴趣。他们将在[10月12日(下星期日)]来吃饭，我们很希望您和瓦尔特也能同来。
屏蔽泵型号价格及产品特点 上海阳光泵业作为国内一家著名的集研制、开发、生产、销售、服务于一体的大型多元化企业，上海阳光泵业制造有限公司一直坚持“以质量求生存、以品质求发展”的宗旨为广大客户提供优质服务!同时，上海阳光泵业一直专注于自身实力的提升以及对产品质量的严格把关，为此，目前不但拥有国内最高水准的水泵性能测试中心、完善的一体化服务体系、经验丰富的水泵专家，同时经过多年的发展，产品以优越的性能、精良的品质、良好的服务口碑获得各项专业认证证书和客户认可。经过团队的不懈努力，上海阳光泵业在国内水泵行业已经取得了很大成就。这样一家诚信为本、责任重于天的水泵行业佼佼者，对于水泵的维修、保养等各大方面都有自己独特的方法，下面就一起来看看吧! 一、PBG立式防爆化工专用屏蔽泵概述： PBG立式防爆化工专用屏蔽泵为机泵一体结构，整机主要由泵体、叶轮、联接体、滑动轴承、定子、转子、屏蔽套、电机壳等零部件组成。屏蔽泵为立式单级单吸离心式，进出口在同一水平轴线上，口径规格相同可直接象阀门一样安装在管路的任何部位上，装卸极为方便，占地面积省。 二、PBG立式防爆化工专用屏蔽泵的产品特点： 1、屏蔽泵结构紧凑，机泵一体化，体积小。其立式结构具有安装占地面积小，运行平衡，安装无需调整。 2、泵进出口设计成规格相同法兰，且位于同一中心线上，可象阀门一样直接安装在管路上，且中心低便于管道布置，安装特别方便。 3、泵与电机同轴，轴向尺寸短，使泵运行更加平稳，噪音低。 4、取消传统轴封方式，避免了输送介质的外泄，因此具有完全无泄漏的显著特点。 5、用滑动轴承替代常规电机滚动轴承，使泵具有运行特别平稳，振动噪音极低。 6、安装栓修方便，无需拆动管路系统，只要拆下连接体螺母即可抽出全部转子部件进行检查和维修。 7、可根据使用要求即流量和扬程的需要进行泵的串、并联运行方式。
四川天宇油脂化学有限公司 P2206屏蔽泵 订货技术协议 买方：四川天宇油脂化学有限公司 卖方：大连帝国屏蔽电泵有限公司 中国·四川·泸州 2015年11月11日
目录 1、概述 2、卖方应遵循的标准和技术规范 3、技术要求 4、供货范围 5、质量保证 6、试验和检验 7、卖方应按期提供的图纸和资料 8、现场服务 9、技术偏离 10、拒收
1、概述 1.1 工程项目简介 四川天宇油脂化学有限公司（以下简称买方）2200#伯胺质量提高技改装置采购设备。项目名称：P2206屏蔽泵(2台)。 1.2 技术协议适用范围 技术协议适用于四川天宇油脂化学有限公司P2206屏蔽泵的最低要求。在遵守现行的有关标准规范的原则下，本规定连同《四川天宇油脂化学有限公司装备采购技术条件附件单》一起、对屏蔽泵、驱动机及辅助设备在设计、制造、检验、试验及交货状态等方面提出补充、强调和限制性的说明。 1.3本技术协议的技术要求及附件是设备设计和制造的最低要求，并未规定所有的技术要求和适用的标准，卖方应提供一套满足本技术协议和所列标准要求的高质量产品及其相应服务。 1.4 买方与卖方共同商议并签字认同的离心泵数据表、图纸资料等构成本附件的一部分，本技术附件与商务合同具有同等的法律效力。 1.5 买方对图纸和资料的认可，以及针对合同设备设计、制造、安装等所采取的一切措施（审查、监造、检验、验收等）不能解除卖方应承担的责任。 1.6卖方所提供的设备应是世界或国内先进水平的、全新的、合格的产品，其技术指标应先进可靠。卖方对本规定的遵守并不意味着可以解除对屏蔽泵机组的正确设计、选型、选材、制造等以及满足规定的运行工况所应承担的责任。 1.7使用的语言及单位制 所有图纸资料采用中文编制。文件和图纸资料及测量仪表中所使用单位必须为国际单位制（SI）。 1.8文件的优先顺序： □订货合同、合同技术协议及附件； □招标技术规格书； □相关的标准与规范。 2、卖方应遵循的标准和技术规范 卖方对屏蔽泵的设计、制造和交货应原则上遵循下面所列出的通用标准及技术规范，同时
外贸业务全套英文邮件 第一步 1. 向顾客推销商品 Dear Sir: May 1, 2001 Inquiries regarding our new product, the Deer Mountain Bike, have been coming in from all parts of the world. Reports from users confirm what we knew before it was put on the market - that it is the best mountain bike available. Enclosed is our brochure. Yours faithfully 2. 提出询价 Dear Sir: Jun.1, 2001 We received your promotional letter and brochure today. We believe that your would do well here in the U.S.A. Kindly send us further details of your prices and terms of sale. We ask you to make every effort to quote at competitive prices in order to secure our business. We look forward to hearing from you soon.. Truly 3. 迅速提供报价 Dear Sir: June 4, 2001 Thank you for your inquiry of June the 1st concerning the Deer Mountain Bike. It gives us great pleasure to send along the technical information on the model together with the catalog and price list. After studying the prices and terms of trade, you will understand why we are working to capacity to meet the demand. We look forward to the opportunity of being of service of you. 交易的契机 4. 如何讨价还价 Dear Sir: June 8, 2001 We have received your price lists and have studied it carefully. However, the price level in your quotation is too high for this market, If you are prepared to grant us a discount of 10% for a quantity of 200, we would agree to your offer. You should note that some price cut will justify itself by an increase in business. We hope to hear from you
英语邀请函回复范文带翻译 英语邀请函回复范文带翻译篇一 Dear : I have heard so much about from that I almost feel as though I knew him. I would certainly enjoy meeting his mother! But unfortunately I expect guests myself on ; and therefore cannot accept your invitation for luncheon on that day. It was thoughtful of you to invite me, and I am extremely sorry I cannot accept, I do hope you will ask me again some time! Sincerely yours, 亲爱的: 我已经从那里知道了许多关于的事，我好像已经认识他似的，能够去见他母亲我当然觉得十分荣幸! 但是很不凑巧:在我自己要招待客人，因此就不能接受您在那天的午宴邀请了。承您如此热情地相约，恰巧因事不能前往，深表歉意，但愿以后能再次荣获您的邀请。 英语邀请函回复范文带翻译篇二 Dear : It would give great pleasure to have your presence at a reception in honor of the Chinese delegation. The reception will be held in the , on . Cocktails will be served promptly at to be followed b dinner at . sincerely hope you can attend. Let know.
屏蔽泵与磁力泵介绍 在反应堆回路中，部分被输送的介质具有放射性，故需要选用无泄漏泵。根据工程习惯，无泄漏泵（也叫“无轴封泵”）系指屏蔽泵和磁力泵。本文简单介绍。 一、结构与原理（请对照最后的附图） ●屏蔽泵原理： 屏蔽泵主要由泵体、叶轮、定子、转子、前后轴承及推力盘等组成，电机与泵合为一体，定、转子之间用非磁性薄壁材料制屏蔽套隔开，转子由前后轴承支承浸在输送介质中。定子绕组通电后，电磁能透过屏蔽套传入带动转子转动，进而带动叶轮输送介质。 ●磁力泵原理： 磁力泵是通过电机轴上的外磁转子（外磁缸）、泵轴上的内磁转子（内磁缸）所产生的磁力，将电机转矩传递给泵轴，进而带动叶轮输送介质。当电机旋转时，外磁转子通过隔离罩与内磁转子相互吸引，带动泵轴与叶轮转动。内外磁转子磁钢块数量相同，形成一一对应的磁极关系，二者同步转动。 屏蔽泵和磁力泵的两个共同点：1、都属于叶片式输送泵；2、没有动密封，可做到无泄露。屏蔽泵和磁力泵的区别在于： 1、屏蔽泵电机是直联式的，其电机转子和定子之间用屏蔽套隔开，电机加装了内循环冷却结构，能起到冷却电机、润滑轴承的目的。 2、磁力泵电动机通过磁性联轴器和外磁缸连在一起，叶轮和内磁缸连在一起。在外磁缸和内磁缸之间设有全密封的隔离罩，将内、外磁缸完全隔开，使内磁缸处于介质之中，电动机的转轴通过磁缸间磁极的吸力直接带动叶轮同步转动。 二、优点与缺点 ●屏蔽泵优点： 1、零件数量只有一般机械密封泵的30%左右，更省去了联轴器，还可配置轴承磨损监视器， 检测轴承的磨损情况。故可靠性高。 2、电机的转子和定子均不与物料接触，即使屏蔽套破裂，也无外泄漏危险，故安全性好。 3、结构紧凑，占用空间小，对底座和基础的要求低，没有联轴器的对中问题，安装容易且费 用低。日常维修工作量少，维修费用低。 4、无滚动轴承和电机的风扇，无需外加润滑油，故运行平稳、噪音低。 5、能在真空系统或“真空”与“正压”交替运行的情况下正常运转而无泄漏。可以在高真空 度情况下直接从真空槽中把物料送至其他容器中。使用范围广，对于高温、高压、极低温、高熔点等各种工况均能满足要求。 ●屏蔽泵缺点： 1、由于采用滑动轴承，且用被输送的介质润滑，故对润滑性差的介质就不适宜采用屏蔽泵输 送。一般适合于屏蔽泵的介质粘度范围为0.1～20mPa.s。 2、屏蔽泵的效率通常低于有密封的离心泵。但在中、小功率情况下，与双端面密封泵相比， 后者由于增加了冷却和冲洗系统的功率消耗，故总效率相差不大。 3、离心泵运行时，要求流量应高于最小连续流量。对屏蔽泵这点尤其重要，因为在小流量工 况下，泵效率较低且会导致发热，使流体蒸发而造成泵干转，引起滑动轴承的损坏。
投诉信回复范文 投诉信回复范文 ｘｘ小区业主： 市政府网站转来题目为ｘｘ县ｘｘ小区业主的投诉信的群众信件办理意见表已收悉，经调查，现就有关咨询题答复如下： 一、20ｘｘ年城西有限责任公司以出让的形式取得该宗土地使用权（岚国用20ｘｘ出字35号），土地性质是综合用地。按照《中华人民共和国土地治理法》的规定综合用地使用年限是五十年，因此ｘｘ小区土地使用权也只能是50年。 二、20ｘｘ年6月，县住建局组织有关部门对ｘｘ小区二期工程的规划设计方案进行了评审会，与会人员对绿化、停车位、通风采光、消防安全、防洪通道等方面提出了修改意见。由于现场建设用地紧张和县城规划建设的实际情况，请你们予以理解。 三、小区商品房的质量咨询题 1、ｘｘ小区共有5幢住宅楼，结构形式均为砖混底框结构，图纸设计、图纸审查及开工建设均在20ｘｘ年4月往常完成。依照《安康市建设局关于进一步加强城镇建筑抗震防灾工作的通知》（安建发[20ｘｘ]15号）文件要求：从20ｘｘ年12月1日起，所有新建建筑都要禁止使用预制混凝土楼板。ｘｘ小区1-5号楼的开工建设时刻均在20ｘｘ年12月1日之前，不在文件规定的时刻之后，施工单位按照设计图纸施工、小卧房为预制混凝土板，客厅、厨房、卫生间及阳台为现浇混凝土楼板。 2、业主反映房屋墙体及楼板出现裂缝的情况，已通知由ｘｘ小区的物业公司配合开发单位、施工单位对小区住房可能存在的咨询题进行检查核实，并按有关规定和责任督促尽快予以妥善解决。 四、ｘｘ小区因规划核实和房屋竣工验收未完成，办证所需要提交的初始登记资料不全，故暂不能办理《房屋所有权证》。现已督催开发商要抓紧办理相关手续。 五、关于物业的咨询题，现由开发商组建设立的物业服务机构，经查确实存在服务不到位的咨询题，我局已督查进行整改。如小区业主对该物业公司服务不中意，能够自行组织召开业主大会，成立业主委员会，自行选择物业公司进行物业治理。关于物业收费标准，应由物价部门治理，住建局无权进行审批。 六、小区修建封闭围墙属于开发商的配套建设部分，业主或物业公司可督促开发商尽快完善，维护其利益。关于监控设施、密码安全门和可视电话设施的安装，物业公司可对上述设施做好预算，在小区内予以公示，然后召开业主大会表决。假如表决通过，能够申请住宅维修资金支付该笔费用。 七、业主与开发商之间应平等和气的以事实为依据协商解决有关咨询题，若开发商及物业服务损害了你们的利益，请宽阔业主应依法维护其合法权益。 ｘｘ县住房和城乡建设局 ｘｘ县国土资源局 公司职员投诉信回复范文 生产简先生、叶先生、行政谢先生、生产车间职员谭ｘｘ： 关于职员谭ｘｘ心声的回复： 1、公司一直以来是欢迎并鼓舞各职员以实名制方式提出自己的意见和建议，不管其意见和建议是对与错，假如是对的，我们作为主管的要去改进，错的要给职员耐心解释清楚，关心解决职员提出的困难，行政要组织并定期的召开职员代表沟通会，让职员畅所欲言反映心声并及时解决存在的咨询题，建立一个职员、主管、公司沟通机制，三厂要在职员打卡处设立总经理投诉信箱，给宽阔职员向公司反映咨询题或心声提供多一个反馈渠道。我建议给
英文邀请函及回复范文_邀请函 1. 邀请朋友共进午餐Inviting a friend to informal luncheon Dear : Will you come to luncheon on , at ? My niece is visiting us and I think you will enjoy meeting her. She is a charming, very pretty girl … and very good company! will be here, and perhaps we can after luncheon. Do say you’ll come! Affectionately yours, Li Ming 亲爱的: 您能在来吃午饭吗? 我侄女正在我们家中作客，我想您会乐于见到她的。她是个漂亮而聪明的女孩子，……同她在一起是很使人高兴的!也到这里来，也许在饭后我们能，说好，一定得来呀! 2. 邀请朋友同他们不认识的人一起共进晚餐Inviting friends to supper with the strangers Dear : I know you are interested in , so I’m sure you’ll be interested in ! They are coming here to supper , and we’d like you and to come, too. are that very charming couple we met in last summer. They have a wonderful collection of ; and I understand that Mr. Lin Dun is quite an authority on . I’m sure you and Walter will thoroughly enjoy and evening in their company. We’re planning supper at six; that will give us a nice long evening to talk. If I don’t hear from you before then, I’ll be expecting you on the ! Affectionately yours, Li Ming 亲爱的: 我知道您对是有兴趣的，所以我相信您对林顿夫妇也会感兴趣。他们将在来吃饭，我们很希望您和瓦尔特也能同来。 是那么好的一对夫妻。我们是去年夏天在认识的。他们集有。我知道，林顿先生在研究方面是颇有权威的。我深信，那天晚上您和瓦尔特同他们在一起，一定会很愉快。 我们准备在6点钟吃晚饭，这样就能有较长的时间闲谈。如果事前接不到您的回信，我就指望你们那天到来。 3. 邀请来家中小住及周末聚会An invitation for a house and weekend party Dear : I hope haven’t any plan for the weekend of as we’d like you to spend it with us at . It’s simply beautiful here now, with everything in bloom! I think we can promise some good fishing this year. The fish are biting better than ever! So bring your fishing clothes; and be s ure to bring your tennis things, too, because are coming and I’m sure you’ll want to get out on the courts with them. There’s a very good train ; I’ve marked it in red on the timetable. It gets you here about
英文投诉信 【写法指要】 投诉信（letters of complaint）通常是写给厂家、商店、消费者协会、报界或厂家、商店的上级主管部门，揭发产品质量的低劣、服务态度的糟糕，抱怨不应出现的情况或问题等，以求得解决的信件。写投诉信要实事求是地把问题讲清楚，态度要冷静，做到有礼貌，不能恶言伤人。 这封信的作者用的是对比法，先写学校的地理位置和原先学校的优美环境，后写化工厂建起后对学校造成的污染，最后提请报界呼吁保护环境的问题。写得有理有据，令人信服。英文投诉信怎么写 投诉信结构公式 右上角：日期 左上角：称呼 正文： 第一段：表明自己的身份，说明写信目的，因何事投诉何人或机构。 第二段：具体阐述投诉的内容和投诉的理由。 第三段：提出解决建议并期望尽快解决，表示感谢。 右下角：署名 下面是一封日常投诉信的范例，请大家体会一下。 Dear Sir/Madam, Please send us a correction on part of our order WP-11. All the items we ordered arrived in excellent condition except for one model. It you refer to our original order (see the copy attached), you will note that we requested your fluorescent desk-lamps, Model 606. However, Model 608 reached us instead. For details, please see the inspection certificate issued by the Tianjin Commodity Inspection Bureau. Will you kindly take back those you sent out and substitute them with an equal quantity (120 items) of Model 606? We would appreciate your attention to this matter promptly. Yours faithfully 英文投诉信模板 Dear_______, I am ______ (自我介绍) .I feel bad to trouble you but I am afraid that I have to make a complaint about_____. The reason for my dissatisfaction is _______(总体介绍). In the first place,_______(抱怨的第一个方面). In addition, ___________(抱怨的第二个方面). Under these circumstances, I find it ________ (感觉)_______(抱怨的方面给你带来的后果). I appreciate it very much if you could _______(提出建议和请求), preferably ______(进一步的要求),and I would like to have this matter settled by ____(设定解决事情最后期限). Thank you for your consideration and I will be looking forward to your reply. Yours sincerely Li Ming 英文投诉信格式
屏蔽泵结构及工作原理 屏蔽泵的特点全封闭式、无轴封（只有静密封而无动密封）的独特结构保证机组决不泄漏；封闭的自循环结构可输送任何介质而保证不对环境造成污染；采用全新的低转速屏蔽电机及介质循环系统保证机组低振动、低噪音、低温升。 泵体采用管道式结构，其进出口径相同且位于用一直线上，能像阀门一样安装在管道的任何位置，方便、快捷、稳固；无轴封、无滚动轴承、无需维护、运行可靠；使用隔振垫、隔振器及金属波纹管等隔振装置后其震动更小、噪音更低；独特的安装结构大大缩小了泵的占地面积，可节约基建投资40%以上。 随着化学工业的发展以及人们对环境、安全意识的提高，水泵在成了人们生活民必不可缺的一部分,人们对生活中一般常有接触的,油泵、化工泵、排污泵、真空泵、磁力泵、隔膜泵、离心泵、自吸泵、多级泵、螺杆泵、往复泵、屏蔽泵、油桶泵、液位计、食品泵、塑料泵、齿轮油泵、液下泵、清洗机、试压泵等水泵类的要求很高,对化工用泵的要求也越来越高，在一些场合对某些泵提出了绝对无泄漏要求，这种需求促进了屏蔽泵技术的发展。屏蔽泵由于没有转轴密封，可以做到绝对无泄漏，因而在化工装置中的使用已愈来愈普遍。 屏蔽泵的原理和结构特点普通离心泵的驱动是通过联轴器将泵的叶轮轴与电动轴相连接，使叶轮与电动机一起旋转而工作，而屏蔽泵是一种无密封泵，泵和驱动电机都被密封在一个被泵送介质充满的压力容器内，此压力容器只有静密封，并由一个电线组来提供旋转磁场并驱动转子。这种结构取消了传统离心泵具有的旋转轴密封装置，故能做到完全无泄漏。 屏蔽泵把泵和电机连在一起，电动机的转子和泵的叶轮固定在同一根轴上，利用屏蔽套将电机的转子和定子隔开，转子在被输送的介质中运转，其动力通过定子磁场传给转子。 此外，屏蔽泵的制造并不复杂，其液力端可以按照离心泵通常采用的结构型式和有关的标准规范来设计、制造。 一般的屏蔽泵采用输送的部分液体来冷却电机，且环隙很小，故输送液体必须洁净。对输送多种液体混合物，若它们产生沉淀、焦化或胶状物，则此时选用屏蔽泵(非泥浆型)可能堵塞屏蔽间隙，影响泵的冷却2与润滑，导致烧坏石墨轴承和电机。 屏蔽泵一般均有循环冷却管，当环境温度低于泵送液体的冰点时，则宜采用伴管等防冻措施，以保证泵启动方便。
屏蔽泵的安全监测和保护装置参考文本 In The Actual Work Production Management, In Order To Ensure The Smooth Progress Of The Process, And Consider The Relationship Between Each Link, The Specific Requirements Of Each Link To Achieve Risk Control And Planning 某某管理中心 XX年XX月
屏蔽泵的安全监测和保护装置参考文本使用指引：此安全管理资料应用在实际工作生产管理中为了保障过程顺利推进，同时考虑各个环节之间的关系，每个环节实现的具体要求而进行的风险控制与规划，并将危害降低到最小，文档经过下载可进行自定义修改，请根据实际需求进行调整与使用。 为提高使用寿命和运转的安全性，屏蔽泵通常都设有 下列保护装置。 1.轴承磨损监测器轴承磨损监测器根据其检测原理通常 分为机械式、机械电气式、电气式、电子式等型式。当屏 蔽泵运转时，可以通过轴承磨损监测器随时监视轴承的运 转情况，当轴承磨损较大时就要停车检修或更换轴承，在 运转时若发生轴承损坏则立即停车。 机械式监测轴承磨损最为直接，可靠性高，但不可 调、没有预警功能。其他形式的轴承监测，可实现现场显 示，且可输出4～20mA信号以及报警开关信号2.电流保 护器屏蔽泵在缺液情况下空运转时，会造成泵的损坏。当
流量大幅度下降时，电流也会大大降低，此时电流保护器可以发出控制信号，通过用户的保护装置将泵停止运行，防止事故发生。同样，在负载过大时，电流增加较多，电流保护器也会动作，自动切断电流，使电机停止运转，防止事故发生。 3.电机过热保护事先将温度传感器预埋在定子三相绕组内，实现超温报警，避免电机绕组的工作温度超出其绝缘等级的要求，同时是对满足防爆性能中温度组别项的一个补充。 传感器主要分三种：热敏电阻(PTC)、热敏开关和热电阻，前面两种价格低，使用比较广泛。 热敏开关和热敏电阻均为位式控制，报警温度不可调，而热电阻传感器通过配备相应的显示仪表，文章由上海泽德水泵整理可以实时监控电机绕组的温度变化，它通常使用在重要泵位以及特殊绕组形式上。
View：This page can be viewed as a slideshow: Introduction:Letters of complaint usually include the following stages: Background Problem - cause and effect Solution Warning (optional) Closing Background This section describes the situation; e.g. I am writing to inform you that the goods we ordered from your company have not been supplied correctly.I attended your exhibition Sound Systems 2011 at the Fortune Hotel (22-25 January) and found it informative and interesting. Unfortunately, my enjoyment of the event was spoiled by a number of organisational problems.I am a shareholder of Sunshine Bank and I am very concerned regarding recent newspaper reports on the financial situation of the bank. Your company is listed as the auditor in the latest annual report of the bank, so I am writing to you to ask for an explanation of the following issues.I am writing to inform you of my dissatisfaction with the food and drinks at the 'European Restaurant' on 18 January this year. Problem 1.Cause: On 28 March 2011 we placed an order with your firm for 12,000 ultra super long-life batteries. The consignment arrived yesterday but contained only 1,200 batteries. Firstly , I had difficulty in registering to attend the event. You set up an on-line registration facility, but I found the facility totally unworkable .You sent us an invoice for $10,532, but did not deduct our usual 10% discount .We have found 16 spelling errors and 2 mis-labelled diagrams in the sample book. 2.Effect: This error put our firm in a difficult position, as we had to make some emergency purchases to fulfil our commitments to all our customers. This caused us considerable inconvenience.Even after spending several wasted hours trying to register in this way, the computer would not accept my application.I am therefore returning the invoice to you for correction.This large number of errors is unacceptable to our customers, and we are therefore unable to sell these books. Solution I am writing to ask you to please make up the shortfall immediately and to ensure that such errors do not happen again.Could I please ask you to look into these matters.Please send us a corrected invoice for $9,479I enclose a copy of the book with the errors highlighted. Please re-print the book and send it to us by next Friday. Warning (optional) Otherwise, we may have to look elsewhere for our supplies.I'm afraid that if these conditions are not met, we may be forced to take legal action.If the outstanding fees are not paid by Wednesday, 13 April 2011, you will incur a 10% late payment fee. Closing:look forward to receiving your explanation of these matters.I look forward to receiving your payment.I look forward to hearing from you shortly. Politeness；he tone of complaint letters should not be aggressive or insulting, as this would annoy the reader and not encourage them to solve the problem. In addition, questions such as 'Why can't you get this right?' should not be included. Content The content should contain enough details so that the receiver does not have to write back requesting more. Legal action is not normally threatened in the first letter of complaint, unless the situation is very serious. Adjustment letter Acknowledging receipt of a complaint letter ；hank you for your letter of … regarding / concerning / in connection with … I refer to your letter of … about / relating to … Apology for the error or fault；We must apologise for …；We sincerely apologise for … ；Please accept our apologies for … ；I would like to apologise for the error made by our company in (verb+ing)； Accepting the Complaint We agree that the usual high standards of our products / services were not met in this instance. ； A short explanation of the fault ；Introductory phrase；As a result of our investigation, we found that... (Not: After our investigation...) Causes :The error was caused by … / was due to … ；Apparently, the problem was the result of … / resulted from … ；The cause of / reason for the mistake was …