A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Hazard of firing open, unconfined shots in coal mines
Disasters through firing open, unconfined shots of bull-dozing type; prevention of disasters by using only permissible explosives properly confined in boreholes and fired electrically by permissible blasting units.
Hazard of firing open, unconfined shots in coal mines
Disasters through firing open, unconfined shots of bull-dozing type; prevention of disasters by using only permissible explosives properly confined in boreholes and fired electrically by permissible blasting units.
Hazard of firing open, unconfined shots in coal mines
U S Bur Mines -- Information Cir
Ankeny, M.J. (author)
1952
4 pages
Report
English
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