题目内容
The function of the check valve is to only allow oil to flow in one direction ( )
查看答案
搜索结果不匹配？点我反馈
更多问题
The check valve adopts a poppet valve structure to ensure a good reverse sealing performance ( )
When a check valve is used as a back pressure valve, its spring should be replaced with a soft spring ( )
When the control port of the pilot operated check valve is not connected to pressure oil, its function is the same as that of the check valve ( )
The three-position five-way valve has three working positions and five channels ( )
微信支付 
支付宝支付