Electronic Test Facility电子测试设备 Environmental Test Facility[计] 环境试验设备 Electronic Target Folder (US Navy CVN-68)美国海军电子目标文件夹(CVN-68) Exchange Traded Fund交易型开放式指数基金 Engineering Test Facility工程试验设备 Engine Test Facility发动机试验设备 Electron Transferring FlavoproteinFlavoprotein电子转移 Emergency Task Force (Toronto)紧急小组(多伦多) Education and Training Factor (factor of educational experience; Immigration Canada)教育和培训教育经验因子(因素);加拿大移民) Electrical Time Fuze电气时间引信 Exchange Traded Fund (financial markets; aka index shares)证券投资信讬基金(金融市场;aka指数股份) Experimental Transwitching Format实验Transwitching格式 Electronic Trip Fare电子旅行费 Electrical Test Facility电气测试设备 European Transport Workers' Federation欧洲运输工人联合会