208手推车
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小推车设计策划书3篇篇一一、项目背景随着人们生活水平的提高和消费观念的变化,小推车作为一种便捷的搬运工具,在家庭、商场、超市等场所得到了广泛的应用。
本项目旨在设计一款功能齐全、外观时尚、使用方便的小推车,以满足消费者的需求。
二、市场分析1. 目标市场本产品的目标市场主要包括家庭用户、商场超市、物流企业等。
2. 市场需求随着人们生活节奏的加快,对于便捷搬运工具的需求越来越大。
同时,消费者对于产品的外观和质量也有了更高的要求。
3. 竞争情况目前市场上的小推车品牌众多,竞争激烈。
我们需要通过创新设计和优质的产品质量来提高市场竞争力。
三、产品设计1. 功能设计(1)可折叠设计,方便携带和存储。
(2)大容量载货空间,满足不同用户的需求。
(3)配备刹车装置,确保使用安全。
(4)采用高强度材料制作,经久耐用。
2. 外观设计(1)简约时尚的外观设计,符合现代审美观念。
(2)提供多种颜色选择,满足消费者个性化需求。
(1)手柄采用人体工程学设计,握感舒适。
(2)车轮采用静音设计,减少噪音污染。
(3)配备购物篮,方便购物。
四、营销策略1. 品牌建设2. 网络营销利用互联网平台进行产品宣传和销售,提高产品知名度。
3. 促销活动定期开展促销活动,如打折、赠品等,吸引消费者购买。
4. 与商场超市合作与各大商场超市合作,将产品展示在显眼位置,提高产品曝光率。
五、生产与供应链管理1. 生产管理建立严格的生产管理制度,确保产品质量和生产效率。
2. 供应链管理与优质供应商合作,确保原材料的供应稳定。
六、财务预算1. 研发费用包括设计费用、模具费用等,预计万元。
2. 生产成本包括原材料采购、生产加工、包装等费用,预计万元。
3. 营销费用包括广告宣传、促销活动等费用,预计万元。
4. 预计销售收入根据市场分析和销售目标,预计销售收入万元。
5. 利润预测预计净利润万元。
七、风险评估与对策1. 市场风险市场需求变化、竞争对手推出新产品等因素可能导致市场份额下降。
600 LB. ADJUSTABLE TRAILER DOLLYOWNER’S MANUALWARNING:Carefully read and understand all ASSEMBLY AND OPERATIONINSTRUCTIONS before operating. Failure to follow the safety rules and other basic safety precautions may result in serious personal injury.10152015PATENT#7,845,670This product is designed for certain applications only. The manufacturer cannot be responsible for issues arising from modification. We strongly recommend that this product not be modified and/or used for any application other than that for which it was designed. If you have any questions relative to a particular application, DO NOT use the product until you have first contacted us to determine if it can, or should, be performed on the product.For technical questions, please call 218-943-6296..TECHNICAL SPECIFICATIONSGENERAL SAFETY RULESWARNING: Read and understand all instructions. Failure to follow all instructions listed below may result in serious injury.CAUTION: Do not allow persons to operate or assemble this adjustable trailer dolly until they have read this manual and have developed a thorough understanding of how the adjustable trailer dolly works.WARNING:The warnings, cautions, and instructions discussed in this instruction manual cannot cover all possible conditions or situations that could occur. It must be understood by the operator that common sense and caution are factors that cannot be built into this product, but must be supplied by the operator.SAVE THESE INSTRUCTIONSWORK AREA•Keep work area clean, free of clutter, and well-lit.Cluttered and dark work areas can cause accidents.•Keep children and bystanders away while operating an adjustable trailer dolly.•Be alert of your surroundings. Using an adjustable trailer dolly in confined work areas may put you in dangerous situations.PERSONAL SAFETY•Stay alert, watch what you are doing, and use common sense when using an adjustable trailer dolly. Do not use an adjustable trailer dolly while you are tired or under the influence of drugs, alcohol, or medication. A moment of inattention while operating an adjustable trailer dolly may result in serious personal injury.•Dress properly. Do not wear loose clothing, dangling objects, or jewelry. Keep your hair, clothing, and gloves away from moving parts. Loose clothes, jewelry, or long hair can be caught in moving parts.•Use safety apparel and equipment. Use approved safety goggles or safety glasses with side shields or, when needed, a face shield. Also use non-skid, safety shoes and gloves whenappropriate.TRAILER DOLLY USE AND CARE•Do not modify the adjustable trailer dolly in any way. Unauthorized modification may impair the function and/or safety and could affect the life of the equipment. There are specificapplications for which the adjustable trailer dolly was designed.•Always check for damaged or worn-out parts before using the adjustable trailer dolly.Broken parts will affect the adjustable trailer dolly operation. Replace or repair damaged or worn parts immediately.•Do not exceed the adjustable trailer dolly load capacity.•Distribute the load evenly. Uneven loads may cause the adjustable trailer dolly to tip, resulting in personal injury to the operator or others.•Use the adjustable trailer dolly on flat and level surfaces capable of supporting the adjustable trailer dolly and its maximum load. Pulling or pushing a load on a slanted or uneven surface can result in loss of control.•Store idle adjustable trailer dolly. When adjustable trailer dolly is not in use, store it in a secure place out of the reach of children. Inspect it for good working condition prior to storage and before re-use.ASSEMBLYSee parts diagram for reference during assembly1. Attach the Link Bracket (#2) to the T-Bar Handle (#1) using four Bolts (#3), four Flat Washers(#4), and four Lock Washers (#5). Put the washers on the bolt before screwing into the holes.2. Attach the Link Bracket (#2) to the Axle Assembly (#16) in the bottom hole using one Bolt(#18), one Washer (#9), and one Nut (#10).3. Attach the upper end of the Brace (#7) and V Support (#6) to the Link Bracket (#2) using oneBolt (#8), one Washer (#9), and one Nut (#10).4. Attach the lower end of the V Support (#6) to the Link Bracket (#2) using one Bolt (#8), oneWasher (#9), and one Nut (#10).5. Attach the lower end of the Brace (#7) to the Axle Assembly (#16) using one Bolt (#13), oneWasher (#9), and one Nut (#10).6. Install the two Flat Free Tires (#17) on both ends of the Axle Assembly (#16) using two HexNuts (#19) and two Split Pins (#20).7. Install the Coupler Ball (#11) onto the Adjustable Tube (#12). Insert the Adjustable Tube (#12)into the Axle Assembly (#16) and secure it with the Pin (#15) and the R Pin (#14).8. Check and tighten all bolts as needed.9. Adjust the Adjustable Tube to the proper height for your trailer. Make sure the pin is securedthrough the Adjustable Tube and the welded tube on the frame. Place the R Pin into the hole of the Pin to secure the Pin.OPERATION1. The designed load limit is 600 lbs. for the adjustable trailer dolly alone, not including loadsupported by trailer wheels. Do not exceed the rated capacity.2. Always keep arms, feet, legs, etc. out from under the trailer tongue while hitching, unhitching,or moving the trailer. Children should always be kept at a safe distance.3. Always make sure any loaded trailer is blocked properly while the adjustable trailer dolly isbeing moved into place.4. Make sure the trailer tongue is securely connected to the adjustable trailer dolly coupler ballbefore attempting to unblock and move the trailer.5. Take precautions to prevent uncontrolled movement of the trailer once it is connected to theadjustable trailer dolly. Remember, the slope of a roadbed surface is difficult to judge, and the pull of gravity can result in a dangerously out-of-control trailer.6. If the adjustable trailer dolly is being connected to a trailer that is being stored over a lengthyperiod of time, make sure both the trailer and the adjustable trailer dolly are blocked properly.7. Keep the adjustable trailer dolly clean and free of road dirt. Inspect the adjustable trailer dollybefore each use to make sure all parts are securely in place and are in working order.Periodically lubricate moving parts.WARNING: FAILURE TO FOLLOW THESE INSTRUCTIONS COULD RESULT IN LOSS OF LOAD, PERSONAL INJURY, AND/OR DAMAGE TO PROPERTY.DIAGRAM & PARTS LIST.For replacement parts and/or technical questions, please call 218-943-6296. WARRANTY: One-year limited parts warranty.Distributed by:TG PO Box 203 Miltona, MN 56354。
C80B 型不锈钢运煤敞车
车型
C80B 型不锈钢运煤敞车
照片
用途 该车是我国适应2万吨编组运输的80t 级煤炭运输重
载专用车辆,能与秦皇岛三、四、五期煤码头的拨车机、列车定位机和三车翻车机等地面设施相匹配,实现不摘钩连续翻卸作业,并能适应环形装车、直进直出装车和解体装车作业。
性能参数及尺寸 载重80t,自重20t,容积84.8m3,车辆长度12000mm,车辆定距8200mm,车辆宽度3184mm,车辆高度3767mm。
结构及配置 该车主要由车体、转向架、车钩缓冲装置及制动装置等组成。
1 车体
该车车体为有中梁、平地板全钢焊接结构,主要由底架、侧墙、端墙、撑杆和车门等组成。
与货物接触的侧、端墙主要型材、板材及地板采用屈服强度为345MPa 的T4003不锈钢,底架(地板除外)主要型材、板材采用Q450NQR1高强度耐候钢。
2 空气制动装置
采用主管压力满足500kPa 和600kPa 的空气制动装置。
主要由120-1型控制阀、305x254的整体旋压密封式制动。
独轮手推车执行标准全文共四篇示例,供读者参考第一篇示例:独轮手推车是一种方便简单的运输工具,广泛应用于不同领域,如物流仓储、建筑工地、园林绿化等。
为了确保独轮手推车在使用过程中安全可靠,提高工作效率,有必要建立一套相关的执行标准。
一、使用范围:独轮手推车主要适用于小型货物的运输,如箱子、袋子、建材等。
不适用于超重或过大物品的搬运。
二、使用人员:只有经过相关培训并掌握操作技巧的人员才可以使用独轮手推车。
未经培训或未满18岁的人员禁止使用独轮手推车。
三、操作规范:1. 在使用独轮手推车前,需检查独轮手推车是否有损坏,如脚踏板、轮胎、把手等部件是否完好。
2. 将货物均匀摆放于独轮手推车的平台上,确保货物稳固不易滑落。
3. 推动独轮手推车时,需要用力平稳,避免急停急转导致货物滑落或独轮手推车翻倒。
4. 在上下坡道行驶时,要特别注意控制速度,避免货物掉落或独轮手推车失控。
5. 独轮手推车仅限于单人操作,不得载客或让未成年人进行操作。
6. 使用完毕后,将独轮手推车停放在指定区域,不得阻碍通道或其他设施的正常使用。
四、维护保养:1. 定期检查独轮手推车的各个部件,如轮胎是否磨损、螺丝是否松动等,及时进行维修或更换。
2. 每次使用完毕后,清洁独轮手推车的表面及货物平台,防止积尘杂物影响使用寿命。
3. 长期不使用时,应将独轮手推车存放在干燥通风的地方,避免雨淋或暴晒导致损坏。
4. 如发现独轮手推车存在严重的损坏或质量问题,应立即停止使用并更换新的独轮手推车。
五、事故处理:1. 如在使用独轮手推车时发生事故,应及时通知相关负责人并进行记录。
2. 对于因操作不当或违反规定导致的事故,相关人员应承担相应责任,并接受相关教育培训。
以上就是关于独轮手推车执行标准的相关内容,希望所有使用独轮手推车的人员都能严格遵守以上规定,确保工作安全、顺利进行。
愿我们的工作环境更加安全、高效!第二篇示例:独轮手推车是一种常见的运载工具,通常用于在仓库、超市等场所搬运货物。
本说明书适用于下列表中各种型号的上汽大众全新途安L多用途乘用车。
用户在使用本公司产品以前,必须认真研读产品使用维护说明书,任何不当的使用、保养和修理都可能导致车辆的损坏及影响质量担保服务。
因此,在使用产品前请认真阅读本使用维护说明书,并对照表中的型号确认您的车型。
名称型号发动机变速箱上汽大众全新途安L多用途乘用车SVW6453AGD CSS五挡手动变速器上汽大众全新途安L多用途乘用车SVW6453BGD CSS七挡自动变速器上汽大众全新途安L多用途乘用车SVW6453CGD CSS五挡手动变速器上汽大众全新途安L多用途乘用车SVW6453DGD CSS七挡自动变速器上汽大众全新途安L多用途乘用车SVW6453GED CUF七挡自动变速器上汽大众全新途安L多用途乘用车SVW6453HED CUF七挡自动变速器上汽大众全新途安L多用途乘用车SVW6453FGD CSS七挡自动变速器上汽大众全新途安L多用途乘用车SVW6453JED CUF七挡自动变速器上汽大众全新途安L多用途乘用车SVW6453ECD CSR五挡手动变速器上汽大众全新途安L多用途乘用车SVW6453QGD CSS七挡自动变速器上汽大众全新途安L多用途乘用车SVW6453KGD CSS五挡手动变速器上汽大众全新途安L多用途乘用车SVW6453LGD CSS七挡自动变速器上汽大众全新途安L多用途乘用车SVW6453MGD CSS七挡自动变速器上汽大众全新途安L多用途乘用车SVW6453NGD CSS五挡手动变速器上汽大众全新途安L多用途乘用车SVW6453PGD CSS七挡自动变速器上汽大众全新途安L多用途乘用车SVW6453RGD CSS七挡自动变速器上汽大众全新途安L多用途乘用车SVW6453SGD CSS七挡自动变速器上汽大众全新途安L多用途乘用车SVW6453ETD DJS七挡自动变速器上汽大众全新途安L多用途乘用车SVW6453FTD DJS七挡自动变速器上汽大众全新途安L多用途乘用车SVW6453GTD DJS七挡自动变速器上汽大众全新途安L多用途乘用车SVW6453ALD DNC五挡手动变速器上汽大众全新途安L多用途乘用车SVW6453BTD DJS七挡自动变速器上汽大众全新途安L多用途乘用车SVW6453CTD DJS七挡自动变速器上汽大众全新途安L多用途乘用车SVW6453DTD DJS七挡自动变速器本使用维护说明书描述了该车型车辆在当前范围的配置、功能及操作的一般通用信息,但用户车辆的实际配置和功能等信息以具体交付时的为准。
TRAILER MOUNTED MONITOR MODEL HD-CHETAKDESCRIPTIONHD-Chetak series mobile foam trailer is designed tomeet today’s industrial firefighting need. The unit is used for fast flexible emergency fire-fighting response in industries. Trailer is having two-wheel or four-wheel pneumatic tyres, depending on load on the trailer . The unit can be easily manoeuvred by two persons or pulled behind by light truck or jeep. The trailer has four stabilizer legs.The Chetak series of trailers are custom designed and manufactured to meet individual plant requirement. The trailer can be supplied in various combination of HD monitors with flow of 500 to 2,000 GPM and with or without concentrate storage tank. The monitor nozzle can be fixed-flow or variable flow type with self-inducting or with JRCP (Jet Ratio Controller Pump).Foam induction percentage provided is 3% for AFFF 3% or ARAFF 3x3% Foam Concentrate. For any other foam model or induction percentage requirement, check with HD Sales T eam.TECHNICAL DATAMODEL HD-CHETAK WATER/FOAM FLOW 500 to 2000 GPM (dependingon HD monitor model)MAX. OPERATING 175 PSI (12 Bar)PRESSURE FRAMING Structural steelDECKING Anti-skid checker plate TYRES Pneumatic radial load bearing BREAKS Manual with overrunmechanical break JAK Four Drop Leg, anti-slip WATERWAY Steel or stainless steel with 2.5 inch male instantaneous coupling with inbuilt swingcheck valveMONITOR 3, 4, 6 inch depending on CONNECTION flow requiredMONITOR ROTATION -5 to +85 deg elevation with & ELEVATION360 deg rotationAPPROVAL UL Listed or FM Approved Monitor PAINTING Red Epoxy painted • Ordering information• Monitor model• Flow • Storage Tank capacity • Foam Concentrate model• Special accessories if anyMonitor Jet reach shall depend on monitor model chosen and appropriate monitor and monitor nozzle catalogue needs to be referred for details.KEY FEATURES• Rugged 2 / 4 wheeled trailer with various capaci-ties of foam storage tank and monitor model • Easy manoeuvre ability by two persons or pulledbehind light truck, tractor , or jeep•80, 100, or 150 mm (3”, 4” or 6”) monitor with or without foam concentrate storage tank• Stainless steel foam concentrate storage tank 200 to 2000 litre capacity• Over run and manual mechanical brake • Low profile design for safety and stability• Four stabilizer leg for added safety• Trailer equipped with reflector Provision of manifoldhaving 2.5” or 4” BSP male instantaneous connection with inbuilt swing check valve at rear side of trailer for water supply to monitor from hydrant network • Non-skid deck • Epoxy paintedTrailer comes with independent suspension axis. The frame is fabricated with heavy duty steel channel with cross members. The tyres are pneumatic radial tyres as rated to road carrying weight. Manual break with overload mechanical braking system is provided. Two Jack stands are provided in the front and two at rear , for use during monitor operation and parking. A barbed ground pad is attached to the foot of jack to increase surface area contact with ground for sta-ble support during monitor operation. Chetak trailers are completely self-contained units, needing only inlet source of water for operation.Optional Accessories: Toolbox, Hoses with a hose box.LIMITED WARRANTYHD FIRE PROTECT PVT. L TD. hereby referred to as HD FIRE warrants to the original purchaser of the fire protection products manufactured by HD FIRE and to any other person to whom such equipment is transferred, that such products will be free from defect in material and workmanship under normal use and care, for two (2) years from the date of shipment by HD FIRE. Products or Components supplied or used by HD FIRE, but manufactured by others, are warranted only to the extent of the manufacturer’s warranty. No warranty is given for product or components which have been subject to misuse, improper installation, corrosion, unauthorized repair , alteration or un-maintained. HD FIRE shall not be responsible for system design errors or improper installation or inaccurate or incomplete information supplied by buyer or buyer’s representatives.HD FIRE will repair or replace defective material free of charge, which is returned to our factory, transportation charge prepaid, provided after our inspection the material is found to have been defective at the time of initial shipment from our works. HD FIRE shall not be liable for any incidental or consequential loss, damage or expense arising directly or indirectly from the use of the product including damages for injury to person, damages to property and penalties resulting from any products and components manufactured by HD FIRE. HD FIRE shall not be liable for any damages or labour charges or expense in making repair or adjustment to the product. HD FIRE shall not be liable for any damages or charges sustained in the adaptation or use of its engineering data & services. In no event shall HD Fire’s product liability exceed an amount equal to the sale price.The foregoing warranty is exclusive and in lieu of all other warranties and representation whether expressed, implied, oral or written, including but not limited to, any implied warranties or merchantability or fitness for a particular purpose. All such other warranties and representations are hereby cancelled.NOTICE :The equipment presented in this bulletin is to be installed in accordance with the latest publication standards of NFPA or other similar organisations and also with the provision of government codes or ordinances wherever applicable.The information provided by us is to the best of our knowledge and belief, and consist of general guidelines only. Site handling and installation control is not in our scope. Hence we give no guarantee for result and take no liability for damages, loss or penalties whatsoever , resulting from our suggestion, information, recommendation or damages due to our product.Product development is a continuous programme of HD FIRE PROTECT PVT. L TD. and hence the right to modify any specification without prior notice is reserved with the company.D-6/2, ROAD NO. 34, WAGLE INDUSTRIAL ESTATE, THANE 400 604, INDIA.• TEL: + (91) 22 2158 2600 • FAX: +(91) 22 2158 2602•EMAIL:***************• WEB: HD FIRE PROTECT PVT . LTD.Protecting What Matters Most to YouINSPECTION AND MAINTENANCEEnsure that trailers are visually inspected every month.Just like any equipment, a well-maintained trailer will perform better and last longer than a neglected one. Routine monthly visual and operational maintenance is recommended.The maintenance department must carry out routine jobs like lubricating moving parts and checking tyre pressure. Cleaning of trailers need to be carried out every month or as required to ensure smooth opera-tion. The unit must be operated at least once in six months or as per local authority having jurisdiction.1. Never start water flow unless the four drop legsare lowered and having full ground support and locked. Apply hand break. 2. Water flow must be started gradually and similarlymust be lowered gradually.3. The trailer is to be used inside industrial premises.HD Fire does not provide any vehicle/trailer road transport approval, certification, or registration, if applicable then owner/ buyer is responsible to obtain the same from local authority having juris-diction.NOTE ON FOAM CONCENTRATE:When using AFFF or AR-AFFF type foam concentrate in the storage tank, it is recommended by HD Fire that a thin layer (approximately 1/4 inch) of a qual-ity mineral oil be placed on the surface of the foam concentrate after filling the tank with the correct quantity. This alleviates the problem associated with evaporation of the foam concentrate.The foam concentrate should be inspected periodi-cally following any of these standards: NFPA 11, EN 13565-2, or any other relevant standards or as per authority having jurisdiction. For tanks containing mineral oil, special tools should be used during annual sampling exercise to make sure no oil is taken with the foam. Consult foam concentrate manufacturer .。
手推车
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《手推车》作于1938年初,后收入诗集《北方》,是艾青诗作的名篇之一。
它在一片灰黄、荒凉的底色上,绘出了黄河流经的中国北部地区人民难耐的贫穷与长久的悲哀,传达出诗人在抗战初期对于民族命运的深沉忧虑和对于农民的一贯的同情。
诗中那独轮手推车发出的“尖音”,刻出的“辙迹”,以及它们所表示的“悲哀”,都出自一种生活实感,是诗人深切感受到的这片大地的贫穷与凋敝,所以这诗也是诗人对于苦难制造者的一个平静而又怆痛的抗议。
诗在光、色、线条与音响的调配上,却是丰富、活跃的。
阴沉的天色与灰黄的土层配合,造成了凄冷的色调,再配以独轮车单调而尖锐的声响,刻画在荒漠土地上的纵横轮迹,一起形成了一种悲剧气氛浓厚的情调,使现实的苦难获得绘画般的视觉的感性体现而更见沉郁凝重,从而烘托出一个悲哀的主题来。
在语言上,运用了虚实法的动宾结构,将诗人得自生活的独特感觉艺术地传导给了读者,使人深入到一种兴会无穷的境界中去。
《手推车》描绘了一幅阴冷悲苦的图画,像是一首深沉忧伤的歌,在诉说着北方农民的不尽的悲哀。
诗中的感情是沉重的,它不是哀伤和悲悯,也不仅是同情和叹息,而更是一个战士痛切的感情和准备战斗的热忱。
这种感情被诗人深藏于“使阴暗的天穹痉挛的尖音”和“灰黄土层上的深深的辙迹”,但我们能分明地感到诗人扼腕的痛楚。
这是对民族对人民的黄土地的一种骨肉深情。
1.简析《手推车》的感情蕴涵和主要的艺术特色。
答:《手推车》这首诗是在一片灰黄、荒凉的底色上,给出了黄河流域的中国北部地区人民生活的贫穷与凄苦,表达了诗人在抗战初期对民族命运的深沉忧虑和对穷苦农民的深切同情。
诗中那独轮手推车发出的“使阴暗的天穹痉挛的尖音”,“刻画在友黄土地上的深深的辙迹”,以及它们所表示的深沉的“悲哀”,都出自一种生活实感,是诗人深切体验到的这片大地的贫穷与凋敝。
生活在这片大地上的苦难人民的哀叹与手推车的“尖音”一样的响彻空谷。
这首诗也可以说是诗人对于苦难制造者的一个平静而又悲怆的抗议。
诗篇在光、色、线条与音响的调配上;是丰富、活跃的。
阴沉的天色与灰黄的土地相配合,构成了凄冷的色调,再配以独轮车单调而尖锐刺耳的声响,刻画在荒漠土地上的纵横轮迹,整体形成了一种悲剧气氛浓厚的情调,使现实的苦难获得绘画般的视觉的感性体现而更见沉郁凝重,从而把悲哀的主题烘托得更为鲜明。
听课笔记:
1、分析手推车意象和诗篇的思想。
答:诗中的手推车是一种象征性的意象,是我们中华民族历史命运深重灾难的某个侧面的体现。
诗人借助手推车表现了北国人民的悲哀,它蕴含着对保守、呆板、落后的生活方式的悲哀,即是诗人对苦难的制造者一个平静又悲怆的抗议,也是对改变手推车生活方式,振奋民族精神的哲理性的启示。
2、简析本诗的艺术手法及其作用。
诗人善于在生活中捕捉具体可感形象——手推车,进行艺术刻画,传达自己独特感受。
全篇分两部分:
一、围绕手推车的“尖音”进行艺术渲染,与北国人民的“悲哀”相呼应。
二、紧扣手推车留下的“辙痕”进行铺陈,与北国人民的“悲哀”相交织,从听觉到视觉给人以强烈的触动。
本诗形式在音节的安排和意境的营造上基本重复(除词句和意象的不同),这种独特的简单反复结构,加深了诗作的气氛和感情。