【化】 oxyacetylene welding outfit
oxygen【医】 o; O2; oxy-; oxygen; oxygenium; phlogisticated gas
【机】 alkyne; alpha-acetylenes
gas【医】 aer-; aero-; air; atmo-; physo-; pneuma; pneuma-; pneumato-; pneumo-
【化】 welder; welding machine