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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 G
Subpart G—Ventilation
subjgrp 175
Surface and Underground
Subjgrp 175. Surface and Underground
§ 57.8518 - Main and booster fans.
§ 57.8519 - Underground main fan controls.
