環かん式しき炭たん化か水すい素そMeaningsNoun1. cyclic hydrocarbonKanji used環loop式ceremony炭charcoal化transformation水water素elementaryComposed of環かんring; band; rim; circum-Noun式しきway; style; fashion; method; system; form; type; ceremony; rite; ritual; …Noun炭たん化かcarbonization; carbonisationNoun水すい素そhydrogen (H)Noun