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Special operations personnel safety training and examination textbooks for: mine ventilation work - Softcover

GUO JIA JING MAO WEI AN QUAN SHENG CHAN JU ZU ZHI

 
9787502935481: Special operations personnel safety training and examination textbooks for: mine ventilation work

Synopsis

Language:Chinese.Soft cover.description:Paperback. Special operations personnel safety training and examination textbooks for: mine ventilation work is starting to strengthen mine special operations personnel safety and technical training. mine special operations personnel qualification a

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