A check valve is a mechanical valve that only permits water flow in one direction.
检查阀(单向阀)是一个手动阀门，这样水只能往一个方向走。
Pumps work, should pay attention to check the pressure, temperature and mechanical seals work.
泵工作时，应注意检查压力、温度和机械轴封的工作。
Need mechanical movement to cover the eyes and remove goggles to check the accomplishment.
需要机械动作来遮蔽眼睛及移开护目镜，检查完成情况。
Need mechanical movement to cover the eyes and remove goggles to check the accomplishment.
需要机械动作来遮蔽眼睛及移开护目镜，检查完成情况。
应用推荐