Supervisors in this unit group supervise and co-ordinate activities of workers engaged in underground and surface mining operations and quarries.
本单元组主管监督和协调从事地下和地表采矿作业和采石场工人的活动。
Supervisors in this unit group supervise and co-ordinate activities of workers engaged in underground and surface mining operations and quarries.
本单元组主管监督和协调从事地下和地表采矿作业和采石场工人的活动。
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