pressure vacuum meter

常见例句

Methods The vacuum negative pressure meter and the delayed control line were used.
方法：用真空負壓表、延遲控制線路，接通電話機免提鍵、存儲撥號鍵。
On the working spot of centrifugal water pump, the detection can be carried out only by fixing the negative pressure translator in the original position of vacuum meter .
在離心式水泵工作現場衹須把原安裝真空表的位置換上負壓變送器即可進行檢測。
First close the plug of a vacuum or pressure meter, if so mounted on the pump, connected to the pump before starting the motor and then open it when the motor move in the normal speed;
如果泵上裝有真空表或壓力表，要關閉其與泵相連接的鏇塞再啓動電動機，待轉速正常後再打開；