Recommended standards for alternating current in coal mines /
by Bureau of Mines Health and Safety Staff.

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Related Names
United States. Bureau of Mines.
Language(s)
English
Published
[Washington, D.C.] : U.S. Dept. of the Interior, Bureau of Mines, [1960]
Subjects
Coal mines and mining > Electric equipment.
Electricity in mining.
Physical Description
25 p. : ill. ; 27 cm.
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