他们受雇于机械，设备，汽车，汽车零部件，飞机及其他金属制品制造企业和机器加工车间。
They are employed by machinery, equipment, motor vehicle, automotive parts, aircraft and other metal products manufacturing companies and by machine shops.
PV C护栏、交通设施、五金件、塑料制品、机械零部件的制造。
PVC parapet, communications facilities, hardware items, plastic products, machinery parts and components manufacturing.
典型零部件的设计广泛应用于机械设计与制造行业中。
In the industry of mechanical design and manufacture, the design of typical-parts is widely applied.
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