ECI=Electronic Communication, Inc 电子通信公司[美]ECabbr.欧盟(=European Community)Echanges culturels Belgo-Chinois.中国-比利时文化交流.ECSL equivalent continuous sound level等级连续声级echnique of solar energy's applicationECF-Bleaching of Eucalypt Kraft Pulp速生桉木硫酸盐浆的无元素氯漂白echinococcous antigen intradermal test包虫抗原皮内试验echinococcus disease of urinary system泌尿系包虫病Echinococcus multilocularis cyst fluid泡球蚴囊液ECB Ethylene Copolymer Bitumen Mixture乙烯共聚体与沥青混合物Echinochloa crusgalli var. mitis L.稗草ECAC European Civil Aviation Commission欧洲民航委员会