维护、测试及维修柴油发动机以及卡车、巴士以及其他重型机车的机械零件，诸如变速箱、悬架、转向和刹车等零部件。

Maintains, tests and repairs diesel motors and the mechanical parts of trucks, buses and other heavy vehicles such as transmissions, suspension, steering and brakes.

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维护、测试及维修汽油发动机和轻型汽车的机械零件，如变速箱、悬架、转向和刹车。

Maintains, tests and repairs petrol engines and the mechanical parts of lightweight motor vehicles such as transmissions, suspension, steering and brakes.

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