TTabbr.电汇(=telegraphic transfer)abbr.炮弹等飞行时间(=time of flight）abbr.电传打字电报机(=telotype)TTRn.目标跟踪雷达(热中子试验反应堆)TTOTransmitter Turn-off 发射机关闭TTCn.长途电话呼叫(终端长途电话局)TTBabbr.[军] Tank Test Bed；坦克试验台架TTEn.临时试验设备(设备暂定目录)TTH(=thyrotrop(h)ic hormone) 促甲状腺激素TTFC双管正激电路TTCNn.(Tree and Tabular Combined Notation)树与表组合记法ttstn.电传打字电报机电报局TTFD(=thiamine tetrahydrofurfuryl disulfide) 硫胺四氢糖基二硫化物, 呋喃硫胺(长效维生素B1)