Entry development with McKinlay entry driver; description of machine; method of operation; cutting and blasting eliminated; roof not broken or disturbed by shooting; ventilation with blower and tubing; time studies and operating records; advantages over hand mining. Presented at convention of Practical Operating Men, Cincinatti.
Entry development with entry drivers
Min. Congress Jl
Mining Congress Journal ; 14 , n 6
1928
Aufsatz (Zeitschrift)
Englisch
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