30 C.F.R. § 57.7806 Oxygen intake coupling.
Title 30 - Mineral Resources
The oxygen intake coupling on jet piercing drills shall be constructed so that only the oxygen hose can be coupled to it.
Title 30: Mineral Resources
PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
Subpart F—Drilling and Rotary Jet Piercing
Rotary Jet Piercing—Surface Only
§ 57.7806 Oxygen intake coupling.
