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Before assembling the ball valve seat sealing surface and be equipped with decent research, and then placed in the closed position the sphere, the installation of left valve, adjusting the gasket, tighten the screws, static pressure irrigation does not leak, this valve can be guaranteed under the seal test seal.
装配前阀座密封面与球体面应配研，然后将球体置于关闭位置，安装左阀体，调整垫片，拧紧螺钉，静压灌水不漏，则此阀在密封试验下即可保证密封。
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Stalky main undercarriage units retracted into the wing, while a nosewheel unit retracted forward into the extreme nose.
对由Schempp-Hirth制造的Goppingen Go 9 试验机进行相关测试，其像铅笔般长的机身要容纳下一台59.6千瓦(80匹马力)的Hirth HM 60R 发动机，发动机安装固定的位置是在重心下方的肩定翼上，同时飞机的前起落架可缩进到前鼻中去了。
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MA Zhihong, LI Jinguo. Designing technique for antivibrating and antishocking of military equipment ［J］.Equipment Environmental Engineering,2006, 3(5):7073.［3］ ZHAN Jiakai,DING Hui,NING He,et al.
由试验结果还得到，安装减振器前，A点响应的总均方根加速度值为4.205 g，安装减振器后，总均方根加速度值为1.779 g，减振效率达到57%。
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According to the pertinent data research knew that,The overseas equipment is makes about 1000 times in the test platform, eliminates the initial period breakdown in the test chamber, because the direction valve use reliable curve is the bathtub curve, namely use initial period and the later period failure rate is highest, therefore carries on the movement and several dozens hour circulation flushings before the installment to the valve, causes the high breakdown the use initial period to pass in the test chamber, thus has obtained the high equipment reliability.
据有关资料研究得知：国外设备是在试验台上作1000次左右，将初期故障消除在试验室，因为方向阀的使用可靠性曲线是浴盆曲线，即使用初期及后期故障率最高，因此在安装前对阀进行动作及几十小时循环冲洗，，使高故障的使用初期在试验室度过，从而获得了高的设备可靠性。
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Pipe insulation installed in all kinds of manual valve handle are not down.
对于工作压力大于1.0 MPa 及在主干管上起到切断作用的阀门，安装前应进行强度和严密性能试验，合格后方准使用。
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Steel casting to be annealed before integration in stern frame construction. Shape of stern frame to be in accordance with tank tests in order to provide sufficient propeller clearance and to avoid cavitation.
铸钢件在与艉框架安装成一体前应进行退火处理，艉框架的形式必须根据船模试验的结构来确定，以便获得足够的螺旋桨间隙和避免产生对螺旋桨的气蚀。
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preinstallation：安装前试验
preinstallationofpipinginhullsection船体分段管系预装 | preinstallation安装前试验 | preinstallation预安装
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preinstallation：预安装
preinstallation安装前试验 | preinstallation预安装 | preliminaryacceptancetrial预备性交接试航
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preinstallation of piping in hull section：船体分段管系预装
preignition 先期发火 | preinstallation of piping in hull section 船体分段管系预装 | preinstallation 安装前试验