pipe ram preventer,ram preventer,ram blowout preventer是什么意思

用法例句

Technology of spray-welding powder hard metal alloy on 1Cr13 large type of gate;

1Cr13大型闸板喷焊粉末硬质合金工艺

Numerical Calculation and Analyses of the Stress Field of the Gate of Cryogenic Valves;

低温阀门闸板应力场的数值计算及分析

The structure,principle and accomplishing course has been described,and been applied to the designing and machining of the gate of the complex sealing flat valve.

阐述了STEP NC的结构、原理及实现过程 ,并应用在复合密封式平板闸阀的闸板设计加工中。

A practical way to solve this problem is to adjust the high level of floodgate board.

工程上通常采用调整闸板高程改变闸孔面积的形式提高配水均度。