机械知识问答（连载之１）汪一佛铸铁怎样用气焊来修复？答：如ＵＮＩ－１００对焊机夹紧臂支座呈冂字型，材质为灰口铸铁。由于铸造砂眼所致，在使用过程中一侧齐耳断裂。用Ｏ２－Ｃ２Ｈ２焰气焊修复方法介绍如下：１主要工艺参数：（１）坡口开带钝边Ｕ型坡口，钝边２... Mechanical Knowledge Quiz (serial 1) Wang Yifu cast iron how to use gas welding to repair? A: If the UNI-100 butt welding machine crampon arm holder was Langzi type, made of gray cast iron. Due to the casting of trachoma, one side of the ear is broken during use. O2-C2H2 flame gas welding repair methods are described below: 1  The main process parameters: (1) bevel with blunt edge U-shaped bevel, blunt edge 2 ...