[化] 防松螺母

lock nut的用法和样例：

例句

Loosen the compression nut tool.放松压紧螺帽工具。
Beneath the handwheel is a hexheaded externally-threaded diaphragm-retaining nut.手轮下面是一个六角形外螺纹横膈膜止动螺母。
The screw is a match for the nut.就像一个螺丝与一个螺母相匹配。
Better stem nut lubrication control.更好的阀杆螺母润滑控制。

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