随着经验的积累，机器操作员可晋升到运营商矿产和金属加工的中央控制和处理操作员。
With experience, machine operators may progress to central control and process operators in mineral and metal processing.
随着经验的积累，机器操作员可晋升到运营商矿产和金属加工的中央控制和处理操作员。
With experience, machine operators may progress to central control and process operators in mineral and metal processing.
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