binding post screw

基本解释

The binder and binding post range in complexity from simple cover and screw to heavy-weight covers with posts riveted permanently into the cover .
从简单的封面和螺丝钉到重量级的封面，而螺丝柱则是永久性，用柳钉钉入封面内。参阅活页装。
Post binding: a type of loose leaf binding. the binder and binding post range in complexity from simple cover and screw to heavy-weight covers with posts riveted permanently into the cover.
螺柱装：是活页装的一种。螺柱夹的封面和螺柱，有不同的复杂程度；从简单的封面和螺丝钉到重量级的封面，而螺丝柱则是永久性，用柳钉钉入封面内。参阅活页装。