机修工是指使用工具维护或修理机器的工匠、熟练技工或技术员[1]。大多数机修工基本只擅长某一领域的机器[2]。机修工资质通常由行业协会或政府机构认证。机械师可根据其维修的机器类型分为两类，即重型机修工和轻型机修工。重型机修工主要维修大型机器或重型设备，如拖拉机和拖车，而轻型机修工主要维修较小的机器，如汽车发动机。
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