【机械工程】弯头管、弯曲管pipe elbow, duct bend
肝闰管Hering duct
鼻泪管狭窄stenosis of nasolacrimal duct
通风道air drain【建】;air duct【建】矿业;vent gutter【建】矿业
收集管collecting duct
乳管扩张症mammary duct ectasia
输精管Sperm duct
鼻泪管口apertura ductus nasolacrimalis【解剖】;orifice of nasolacrimal duct【解剖】