【化】 sulfur resistant catalyst
contend with; defy; fight; refuse; repel; resist
【医】 Adv.; contra-; ob-
sulfur; sulphur
【化】 sulphur
【医】 S; sulf-; sulfo-; sulfur; sulph-; sulphur; thio-
activator; catalyzer
【计】 catalyst
【化】 catalyst; catalyzator; catalyzer
【医】 accelerant; catalyst; catalytic agent; catalyzator; catalyzer
contact substance