我厂在修理各种机床和动力设备时,有不少轴类零件由于磨损超限而报废更新。为使待修机器及时修好使用,国家每年必须制造供应大量的备品配件。但是换下来的轴类零件一般除了个别地方磨损外,大多还是完整无缺的。 I plant a variety of machine tools and power equipment repair, there are a lot of shaft parts due to wear and tear and scrapped renewal. In order to repaired the machine to be repaired and used in time, the country must manufacture and supply large quantities of spare parts each year. However, the replacement of the shaft parts generally wear apart in some places, most are still intact.