duct russian
труба́
pipe, tube, duct
chimney, funnel, smoke-stack
trumpet
horn
кана́л
canal, duct, bore
channel
ру́сло
channel, duct, course
(river-)bed
тягу́чий
viscous, viscid, syrupy, malleable, ductile, slow, leisured, leisurely
прото́ка
canal, duct
прото́к
channel, canal
duct / passage
ко́вкий
malleable, ductile
ко́вкость
malleability, ductility