... prime meridian 原始子午线，本初子午线 prime valve注油阀 priming device 气动注油装置，气爆装置 ...
双语例句
1
Installations with suction lift require a good quality foot valve to avoid loss of prime - remove in-built check valve.
进水口的安装需要使用一个品质优良的底阀，以避免进水口压力损失- 拆除内置式止回阀。
2
All Stenner metering pumps have a 3-point roller design in the pump head, which ACTS as a check valve to prevent back flow, siphoning, overdosing and loss of prime.