12Probing into the Supporting Technology of Roadways in the "Three - softs" Strata of Longkou Coal Mining Area30-31
13Analysis of A Number of Technical Problems in Dust Precention and Control of China's Coal Mines37-39
15Using the Spraying Apparatus between Sapports for Solving the Dust - proof Problem of Fully - mechanized Roof - coal Caving Faces48-50
16A Trial Discussion on the Relation between Standarization and Safety Management of Total Personnel55-56