River Conservancy Pub 2018-07-01 125 Chinese Due to complex geological conditions. safety management of the Yellow River Conservancy Press behind small and medium sized coal mines. lack of safety evaluation work. less secur...
"synopsis" may belong to another edition of this title.
Seller: liu xing, Nanjing, JS, China
paperback. Condition: New. Paperback. Pub Date: 2018-07-01 Pages: 125 Language: Chinese Publisher: Due to complex geological conditions. safety management of the Yellow River Conservancy Press behind small and medium sized coal mines. lack of safety evaluation work. less security of production inputs and other factors exist. coal security situation is very grim. reduce or avoid the occurrence of accidents and casualties is still small . Seller Inventory # NN046112