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30 C.F.R. § 57.22203 – Main fan operation (I-C mines). | Midpage
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Code of Federal Regulations
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Part 57
Subpart T
ECFR61019fc6b63f34d
§ 57.22203
30 C.F.R. § 57.22203
Main fan operation (I-C mines).
Main fans shall be operated continuously while ore production is in progress.