tdbTradeandDevelopmentB..nwtdbnew water-tube donkey boiler(s) 新型水管辅助泵锅炉spdtdbsingle-pole double-throw double-break (switch) 单刀双掷双断（开关）TDBGTraining Depot Brigade of Gurkhas （英军中的）廓尔喀士兵训练补给旅TDBMTrack Database Manager; Technical Data Base M...BTDBBermuda Trade Development Board 百慕大贸易开发委员会NSTDB[计]= National Strategic Target Data Base,国家战略目标数据库