Procedure for permitting the use of belt air to ventilate working sections of underground coal mines
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Publication
2012 - U.S. Department of Labor, Mine Safety and Health Adminstration, Arlington, Va.], Virginia
Language
English
Word Count
0 words, Guess
Page Count
0 pages
Identifiers
- OCLC Control Number851380125
- Open LibraryOL54279044M
Subjects
Series Statement
- Procedure instruction letter -- no. I12-V-14
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