Adjust the width of box plus locking handle with slide, adjust the width of face punching plug - chip regulator is used to ensure the piercing has always been at the center position.
盒体宽度的调节采用滑槽加锁紧手柄，冲孔面的宽度调节则采用塞片调节，保证冲孔始终在中心位。
The invention has the advantages of a double locking structure by use of the plug, the jack and the movable button, high safety and simple structure and is not easy to be lost.
本发明的有益效果在于：采用插头与插孔和活动扣的双重扣紧结构，安全性高，结构简单，不易丢失。
The invention has the advantages of a double locking structure by use of the plug, the jack and the movable button, high safety and simple structure and is not easy to be lost.
本发明的有益效果在于：采用插头与插孔和活动扣的双重扣紧结构，安全性高，结构简单，不易丢失。
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