题目内容
In the volumetric speed control circuit, the pressure relief valve in the main oil circuit plays a safety protection role ( )
查看答案
搜索结果不匹配？点我反馈
更多问题
The throttle speed control circuit should have back-pressure in the return oil line to achieve smooth movement ( )
Compressed air has lubricating properties ( )
In a pneumatic system, generally, a muffler should be installed at the exhaust port of the directional control valve ()
Pneumatic circuit generally does not have exhaust pipe ( )
微信支付 
支付宝支付