此单元组还包括操作预先组合好的生产焊接，钎焊和锡焊设备的机器操作员。
This unit group also includes machine operators who operate previously set up production welding, brazing and soldering equipment.
此单元组还包括操作预先组合好的生产焊接，钎焊和锡焊设备的机器操作员。
This unit group also includes machine operators who operate previously set up production welding, brazing and soldering equipment.
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