矿井维修电工：初级、中级、高级（修订本）/煤炭行业特有工种职业技能鉴定培训教材
by 人力资源和社会保障部教材办公室，中国就业培训技术指导中心上海分中心，上海市职业技能鉴定中心
Official training manual for coal mine electrical maintenance, covering beginner to advanced vocational skills and certification requirements.
About This Book
This textbook is designed for vocational skill identification and training in the coal industry.
It covers essential knowledge and practical skills for mine electrical maintenance workers.
The content is structured for learners at primary, intermediate, and advanced certification levels.
Published under the guidance of official vocational training authorities in China.
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