Electrical motored equipment :approvals and extensions

Author: Ilsley, L. C.
Additional Authors: Means, M. W.
Year: 1929
Document Type: USBI
Issuing Agency: U.S. Dept. of Commerce, Bureau of Mines,
SUDOC: C 22.11:6218
Series: Information circular / Bureau of Mines ;
Report Number: 6218
Subject: Coal mines and mining--Safety measures
Link: https://hdl.handle.net/2027/mdp.39015077567728

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