The bulb should just screw into the socket.
把灯泡拧到灯口上就行。
It's much harder, they say, to dislocate a screw than a round-ball-and-socket joint.
这种螺纹状的关节与球状关节相比，更难发生脱臼的情况。
Remove one socket pin head screw, three socket head bolts and gear operator cover.
拆卸一个灯头钉头螺丝，三个套筒头螺栓和齿轮执行机构盖。
Top view of fluted socket head set screw.
圆头一字槽螺钉的俯视图。
Top view of fluted socket head set screw.
圆头一字槽螺钉的俯视图。
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