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