After the adjustment, screws tight the stopping nut.
调整后，拧紧锁紧螺母。
Loosens rotates boom's stopping nut, promotes the hopper changes to the next working procedure.
松开回转叉架的锁紧螺母，将料斗推出转到下一工序。
The results show that the failure is mainly attributed to the inappropriate heat-treatment technology of the locking nut and the hydrogen brittlement from electroplating of the stopping pad.
构件失效的主要原因是：锁紧螺母的热处理工艺不当，止动垫电镀过程发生氢脆。
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