Code of Federal Regulations
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30 CFR Mineral Resources
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I Mine Safety and Health ...
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B Testing, Evaluation, an...
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27 Methane-Monitoring Sys...
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Subpart B —
Construction and Design Requirements
§27.20 —
Quality of material, workmanship, and design
§27.21 —
Methane-monitoring system
§27.22 —
Methane detector component
§27.23 —
Automatic warning device
§27.24 —
Power-shutoff component