Experience as a labourer in mineral and metal processing is usually required for machine operators.
机器操作员通常需要具有矿产和金属加工的劳动者经验。
Experience as a machine or process operator in mineral and metal processing is usually required.
通常需要矿产和金属加工机器或过程操作员的经验。
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。
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