Spaces between railroad tracks should be ample. Feeder increases capacity of screens and enables them to screen more accurately. Loading booms should be lowered and raised by electric motor. Paper read before Rocky Mountain Coal Min. Inst.
Suggestions as to the design of a tipple to suit ordinary market conditions of the west
Coal Age
Coal Age ; 20 , n 16
1921
4 pages
5 Figs.
Aufsatz (Zeitschrift)
Englisch
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