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30 CFR Mineral Resources
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I Mine Safety and Health ...
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O Coal Mine Safety and He...
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75 Mandatory Safety Stand...
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Subpart Q —
Communications
§75.1600 —
Communications
§75.1600-1 —
Communication facilities; main portals; installation requirements
§75.1600-2 —
Communication facilities; working sections; installation and maintenance requirements; audible or visual alarms
§75.1600-3 —
Communications facilities; refuge alternatives