煤炭行业特有工种职业技能鉴定培训教材:信号工、把钩工(修订本)(初级、中级)

A professional skill appraisal of coal industry training materials bell man. put the hook (revised edition) elementary and intermediate(Chinese Edition)

paperback. Zustand: New. Language:Chinese.Paperback. Pub Date: 2016-11-01 Publisher: coal industry publishing house Book to bell man. put the hook national professional standards as the basis. respectively introduces the elementary. intermediate bell man and put the hook professional skill appraisal appraisal of knowledge and skill requirements.Basic knowledge including electricity. pliers. mine transportation knowledge. mine signal device and communication devices. electrical safety and the explosion of knowledge an. Artikel-Nr. DO041339

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