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title 30
Mineral Resources
chapter I
CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
part 57
PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
subpart T
Subpart T—Safety Standards for Methane in Metal and Nonmetal Mines
subjgrp 208
Underground Retorts
Subjgrp 208. Underground Retorts
§ 57.22401 - Underground retorts (I-A and I-B mines).
