drawtube

/draw-toob, -tyoob/US // ˈdrɔˌtub, -ˌtyub //UK // (ˈdrɔːˌtjuːb) //

拉管,牵引管,拔管,抽管

Definitions

n.名词 noun

1
- : a tube sliding within another tube, as the tube carrying the eyepiece in a microscope.