The production of phosphine while machining spheroidal graphite iron.
D000397:Air Pollution / Q000737:chemistry*; D006108:Graphite; D006794:Household Articles; D007501:Iron; D010720:Phosphines; D010758:Phosphorus / Q000737:chemistry*
D010720:Phosphines; D010758:Phosphorus; D006108:Graphite; D007501:Iron; C044646:phosphine
AIR POLLUTION/chemistry; PHOSPHORUS/chemistry