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Procedure for permitting the use of belt air to ventilate working sections of underground coal mines.

Bibliographic Details
Corporate Author: United States. Mine Safety and Health Administration, (Author)
Format: Government Document Online Book
Language:English
Published: [Arlington, Va.] : [U.S. Department of Labor, Mine Safety and Health Administration], 2012.
Series:Procedure instruction letter ; no. I12-V-14.
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Online Access:ONLINE VERSION
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