支重轮铜套是拖拉机的一个易损零件,由于其内孔磨损需要经常更换,每年要耗费国家大量的铜。因此,修复旧铜套使其能继续使用具有重大的经济意义。我厂广大职工遵照毛主席“厉行节约”、“勤俭建国”的教导,修旧利废,采用收缩法修复C-80拖拉机支重 The roller bushing is a fragile part of the tractor. It needs frequent replacement due to wear of its inner hole, and it consumes a large amount of copper in the country every year. Therefore, it is of great economic importance to repair old copper sheaths so that they can continue to be used. The majority of employees of our factory follow the guidance of Chairman Mao’s “Strict Savings” and “Diligently Building a Country,” repairing and repairing old waste, and using contraction to repair C-80 tractor weights.