打开泄压阀 Pressure bleed Valve
排泄开关 drain cock
开式泄水管 open ended drain pipe
开始泄漏 Start The Leak
开始泄露 Start the Leak
接点断开漏泄电流 open contact leakage current
急开吹泄阀 quick-opening blow valve
泄放开关 blow-out switch
开路输出泄漏电流 open collector output leak current
开泄
"Open and release"
以上为机器翻译结果，长、整句建议使用 人工翻译 。
PCTH测试阀可实现持开的功能，环空泄压后仍能保持开启状态，使用起来更加方便、灵活。
PCTH tested valve has the function of being open state constantly and that keeping on open after annulus pressure relived out makes it much handy and be liable to be used.
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特制急速放泄阀门，开模下降。
Special rapid release vent valve, mold down.
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