Safe mechanical equipment for use in shaft sinking

Author: Kudlich, Rudolf H.,
Year: 1922
Document Type: USBM
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.7:276
Series: Technical paper / United States Department of the Interior, Bureau of Mines ;
Report Number: 276
Subject: Shaft sinking
Link: https://hdl.handle.net/2027/mdp.39015078536748

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