A bolt on a lock that is moved by turning the key or knob without activation of a spring.
一种锁闩，在没有弹簧的作用下，靠转动钥匙或把手使它移动。
Once that is done THEN tighten the center bolt and follow by tightening the support knob.
中心螺栓和脚架支撑盘也已经一体化设计进去了。
Once that is done THEN tighten the center bolt and follow by tightening the support knob.
中心螺栓和脚架支撑盘也已经一体化设计进去了。
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