ethyleneoxy乙烯氧基ethylenen.乙烯ethylenediamine sulfate硫酸乙二胺ethylene quencher model急冷器ethylene spherical tank乙烯球罐ethylene polysis furnace乙烯裂解炉ethylene oxide indicator乙烯氧化物气体消毒指示剂ethyleneimine isocyanate乙撑亚胺异氰酸盐Ethylene Glycol Stearate乙二醇单硬脂酸酯ethylene oxide hydration环氧乙烷水合ethylene cracking heater乙烯裂解炉ethylene tetramerization乙烯四聚