PE44350资料

Designation:D790–07

StandardTestMethodsfor

FlexuralPropertiesofUnreinforcedandReinforcedPlastics

andElectricalInsulatingMaterials1

ThisstandardisissuedunderthefixeddesignationD790;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.

ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.

1.Scope*

1.1Thesetestmethodscoverthedeterminationofflexural

propertiesofunreinforcedandreinforcedplastics,including

high-moduluscompositesandelectricalinsulatingmaterialsin

theformofrectangularbarsmoldeddirectlyorcutfromsheets,

plates,ormoldedshapes.Thesetestmethodsaregenerally

applicabletobothrigidandsemirigidmaterials.However,

Catalog MSG14-2550/USB01_Cat2550.indd, ddp, 04/19B21Parker Hannifin Corporation

Hydraulic Valve DivisionElyria, Ohio, USABProportional Pressure Relief ValvesSeries R4V and R6V (Onboard Electronics)

General DescriptionSeries R4V and R6V proportional pressure relief valves feature onboard electronics based on the func-tionality of the digital amplifier PCD00.The digital onboard electronic is situated in a robust metal housing and can be used in rough environments. The nominal values of the valves are factory set. Additionally the ProPxD software permits the editing of all parameters. The software is also used for the digital electronic modules. The cable for connection to a serial RS-232 interface is available as accessory. The electrical connection is available in 2 options:Code 10V: 6 + PE central connection 0...+10V command signal (preset) +10V reference voltage outputCode 4MA: 6 + PE central connection 4…20mA command signal (preset)The proportional solenoid operated pilot stage with in-tegrated electronics controls a seated type main stage. The valves are available with an optional mechanical maximum pressure adjustment.Features• Pilot operated pressure relief valve• Onboard electronics• Factory set• Ramp time adjustment• Linearized characteristicsTechnical InformationR4V OBER6V OBE

德国化学成分牌与DIN系统的数字材料对照表

文档编制序号：[KK8UY-LL9IO69-TTO6M3-MTOL89-FTT688] QUALITYOUTLINE

Followingisabriefsummaryofavailabletypesofquality.

Typesnotlistedcanbemadeavailableuponrequest.

Forfurtherinformation,pleasefeelfreetocontactus!

Coldworkingsteels

MATERIALNO. DESCRIPTION/

OSSENBERG DIN AISI/SAE/ASTM

1.1545 WO10Extra C105W1 W1

1.1645 WO10Prima C105W2 W1

1.1730 WO3 C45W 1045

1.1740 WO5 C60W

1.2056 KP6 90Cr3

1.2063 NSZ 145Cr6

1.2067 NSK 102Cr6 L3

1.2080 ESC X210Cr12 D3

1.2083 BPS2 X42Cr13 420

1.2101 SPCR 62SiMnCr4

1.2109 KLS 125CrSi5

1.2127 MNC 105MnCr4

1.2162 BPS 21MnCr5 5120

1.2201 ESW X165CrV12

1.2206 Wo120 140CrV1

1.2208 1.2208 31CrV3

1.2210 CRV 115CrV3 L2

1.2241 OV 51CrV4

1.2242 OVH 59CrV4

1.2243 GBV6 61CrSiV5

1.2248 GBN 38SiCrV6

1.2249 GBV 45SiCrV6

1.2304 1.2304 85CrMo7

1 医用循序减压弹力袜学习资料

由来

弹力袜并非弹力丝袜，弹力袜的全名应该叫做压力递减型弹力袜，与一般妇女穿的丝袜有着很大的区别。说到弹力袜的由来，还有一则有趣的故事。

18世纪，有一位商人因严重的静脉曲张出现下肢溃疡(俗称老烂腿)。他有一个习惯，就是每年要到当地有名的温泉去放松几个星期。当地的温泉因为泉眼比较小，只能站在里面泡浴。令他感到奇怪的是，2 每年在温泉泡了几次后，脚上的溃疡都神奇般地好了。这位商人是一个非常善于思考的人，他想知道到底是什么治愈了自己的溃疡，是温泉的水质还是其他。于是他就做了个实验:将温泉的水带回家放在浴缸里洗澡，结果溃疡没有改善，而站在自己家的浴桶里洗澡，溃疡却能够治愈。显然，溃疡的治愈与水质关系不大，而与站浴有关。商人和他的几个研究物理的朋友一推敲，明白了其中的道理:就是站在温泉里洗澡和站在浴桶里洗澡都有一个共同点，就是站立时水产生的静水压在脚底最大，由下而上逐渐递减，大腿露出水面，静水压为零。就是这种由下而上递减的压力治愈了他的溃疡。商人脚上的溃疡是老毛病了，总不能随时带着水桶做治疗吧?于是商人和纺织厂商合作发明了一种治疗用的弹力袜。该袜的特点就是下面紧上面松，穿到脚上后压力由下而上递减，踝部压力最大，小腿次之，膝上最小。

弹力袜是一双经由特殊设计，品管严格的医疗弹性袜。主要藉由其渐进式压力由脚踝处渐次向上递减，收缩小腿肌肉，以预防静脉充血，使血液回流心脏，达到预防治疗静脉曲张、下肢静脉血栓和瘦腿美体的作用。

医用循序减压弹力袜在脚踝部建立最高支撑压力，顺着腿部向上逐渐递减，在小腿肚减到最大压力值的70%-90%,在大腿处减到最大压力值的25%-45%.压力的这种递减变化可使下肢静脉血回流，有效的缓解或改善下肢静脉和静脉瓣膜所承受压力。

弹力袜有促进静脉回流的功能，适用人群： 3

1.

下肢静脉曲张术前、术后以及下肢深静脉血栓形成患者慢性期的辅助治疗。

2. 需要长时间站立或坐立的人群，如伴重体力劳动尤其需要。