ethylenes乙烯属烃ethylenen.乙烯ethylene oxidic ester缩水甘油酯ethylene-urea resin[化] 乙烯脲树脂ethylene chlorohydrin氯乙醇,乙撑氯醇,2 氯乙醇ethylene silicone oil乙烯基硅油ethylene concentrator乙烯提浓器ethylene chlorination乙烯氯化ethylene cracker feed乙烯料ethylene raw material乙烯原料ethylene oxide adduct环氧乙烷加成物ethylene dimerization乙烯二聚