Safety Course for Bituminous-coal Miners: Handbook for Miners

Front Cover
U.S. Government Printing Office, 1949 - Coal mines and mining - 253 pages

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Contents

Preface 111
1
Fig Page 1 Piece of roof rock that fell on a miner
7
Timberman testing roof by the sound and vibration method in presence of foreman
18

42 other sections not shown

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