check nut

常见例句

The accident was due to the action of acid o the check nut.
事故是由于酸对防松螺母的作用而发生的。
Gravity ball check valves are converted to foot valves by replacing the union nut and end connector on the receiving end – seat end – of the body with an F.
重力球形止回阀可以变为底阀，只需在接受端口- 阀体的阀座端口，用一个F。
Then loose the rocker nut of journey switch, and adjust the rocker to front, if after adjusted for many times still not available, then please check the journey switch whether was damaged or not.
把行程开关摇臂螺母松开，将摇臂往前调即可，如多次调整无效，请检查开关是否损坏。
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