The pressure is maintained on the line for a specified time.
在管道中的压力应保持规定的时间。
Relief Angle valve. Pressure or vacuum can be specified.
安全角阀。可指定压力或真空度。
Design pressure shall be as specified on Purchaser's drawing or data sheet.
设计压力在买方图纸或数据表中加以指定。
Pressure or vacuum can be specified.
可指定压力或真空度。
Pressure or vacuum can be specified.
可指定压力或真空度。
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