原电池型的氢传感器和燃料电池属于前者，氢泵、蒸汽电解器和膜反应器属于后者。
Galvanic cell type hydrogen sensors and fuel cells belong to the former, and hydrogen pump, steam electrolyzer and membrane reactors to the latter.
在对某火箭发动机氢、氧涡轮泵支撑结构进行有限元分析的同时，对该结构进行了力学理论探讨。
Based on finite element analysis and the principle of mechanical equivalence, the supporting structures for the hydrogen and oxygen turbine pumps of a rocket engine were analyzed.
笔者针对制氢装置急冷水泵汽蚀现象，从装置生产实际入手，全面分析了泵产生汽蚀的原因。
In allusion to the cavitation of chilling water pump, this article analyzes the causes of cavitation of chilling water pump from working principle.
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