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在检修天平的工具中 ,有一对用来测量天平四角变动性误差的专用工具———吊角器 ,它可以测出天平两边刀是否平行于中刀 ,以及误差大小。根据多年检修天平的经验 ,我在这里简单介绍其正确使用的方法 ,并与天平检修同行探讨。将吊角器分别挂在天平两边刀垫的前端（和边刀一端对?
In the tool for overhauling the balance, there is a pair of special tools used to measure the variation of the balance of the four corners of the balance - the angle of hitch, which can measure whether the scales are parallel to the knife on both sides of the knife, and the error size. Based on years of experience in overhaul balance, I briefly introduce the correct way to use, and with the balance overhaul colleagues. The hanging angle were hung on both sides of the balance in front of the knife (and one end of the knife?