应该翻译
Pneumatic rod
contra-propeller(整流板)
Control hydraulic(控制液压)
还有相关的词语也可以参考,也许有用
液压驱动泵medium
液压泵 fluid clutch
液压回路Hydraulic circuitv
进油和回油节流调速Flow control valves in inlet and outlet lines
双缸顺序控制Sequence control with two cylinders
快进回路Rapid-traverse feed circuit
差动回路Differential circuit
分流阀Flow divider
位移-步骤图Displacement-step diagram
电液压系统 Electrohydraulics
...