Import boxes are a special form of cut-off valve.
进口隔膜阀是一种特殊形式的截断阀。
The cut-off valve type, the internal leakage is not allowed.
对于截断阀类来说，内漏是不允许的。
Close shutoff valve No. 2 then shut off valve No. 1 on test assembly.
关闭2号关闭阀，然后关闭测试总成上的1号阀门。
Emergency Fuel Shut Off Valve.
燃油紧急关闭阀门。
Emergency Fuel Shut Off Valve.
燃油紧急关闭阀门。
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