ductern.微阻计(测小电阻的欧姆表)ductn.管道；导管vt.用导管输送duct of seminal vesicle精囊排泄管Ductus arterious patent动脉导管未闭Ductility and toughness塑韧性ductus nasohypophysialis鼻垂体管duct type smoke detector通风管式感烟探测器ducted-propulsion unit空气喷气推进装置ductus paramesonephricus[医] 副中肾管ducto-acinar carcinoma[医] 管腺泡癌ducts utriculosaccularis椭圆球囊管ductility seismic design延性抗震