Isbn: 9787502027902 - 【二手书旧书95成新】矿井防尘工(初级中级高级),煤炭工业职业技能鉴定指导中心,煤炭工业出版社 (1 risultati)

paperback. Condizione: New. Paperback. Pub Date: 2006 Pages: 182 Language: Chinese in Publisher: Coal Industry Press mine dust-workers (beginner. intermediate. advanced) were introduced: beginner. intermediate. advanced mine workers dustproof vocational skills assessment identification requirement for knowledge and skill requirements. Include mine dust hazards and governance. mine dust control system. flameproof facilities. rules of order. the roadway dust cleared. the dust dust source analysis and dustproof piping syst.…