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我厂吊车上的零件耳环如图1所示,材料为2C35Mn精铸件,工艺工序要求按划线加工,在四爪卡盘上校正后车削小端有关尺寸。此种方法校正
The earrings of the crane on our factory are shown in Fig. 1, and the material is 2C35Mn casting. The process requirements are based on the scribing process, and the dimensions of the turning small end after correction on the four-jaw chuck. This method of correction