目前,生产中使用的攻丝和套丝铰杠种类很多、规格不一,给使用和保管带来诸多不便。为此,我们对使用的平铰杠进行了改进。改进后的平铰杠具有两种规格,其结构基本相同。具体的结构如图1所示,由手柄1、5,螺钉 At present, there are many kinds of tapping and wire binding hinges used in production, with different specifications, which bring a lot of inconveniences to the use and storage. For this reason, we have made improvements on the flat hinges used. The improved flat hinge has two specifications, its structure is basically the same. The specific structure shown in Figure 1, by the handle 1,5, screw