| 摘要 |
The screw lock, which has a main body(10) and a projection part(35) which is attached to the bush(30), is rotated together with the round shape hinge(23) of a cylinder(20). The helical axis part(42) of the key(40) is composed of a slot groove and a helical curve(43). The helical key(40) is formed of a counter clockwise direction. The helical curve of the key and the key pathway(32) of the bush(30) are rotated with each other.
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