题目内容
Low pressure system generally selected __________ structure pressure relief valve as safety valve. ()
查看答案
搜索结果不匹配？点我反馈
更多问题
The orifice of throttle valve should select ().
If the valve core of a three position directional control valve is in the center position, the pressure oil is connected with the two chambers of the hydraulic cylinder and the return oil is closed, then the center function of the valve is ().
Compared with throttle valve, the remarkable characteristics of speed regulating valve is ().
In a hydraulic system (a hydraulic pump driving an actuator), what type of center function should be selected to unload the pump and lock the actuator. ()
微信支付 
支付宝支付