30 CFR Part 57Public Domain
§ 57.7806 — Oxygen intake coupling
Subpart F — Drilling and Rotary Jet Piercing
The oxygen intake coupling on jet piercing drills shall be constructed so that only the oxygen hose can be coupled to it.
Public Domain: 30 CFR Part 57 (MSHA Safety and Health Standards — Underground Metal and Nonmetal Mines) is a U.S. government publication and is not subject to copyright. Text extracted from the official source ↗. Figures are served from the eCFR; if one does not load, use the link in its place.