Isbn: 9787502046316 - 矿井测尘工-煤炭行业特有工种职业技能鉴定实操培训推荐教材 (1 resultados)

paperback. Condición: New. Language:Chinese.Pub Date: 2014-10-01 Publisher: Coal Industry Press mine dust measuring station (coal industry to identify specific types of vocational skills training in the practical operation of recommended textbooks). In recent years. combined with the measured dust mine workers job skills identification project by Shenhua Ningxia Coal Industry Group Co. Ltd. Education and Training Center compilation. including primary. secondary workers. senior workers three parts. The book to enhance .…