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drawtube是什么意思

drawtube

美['drɔːˌtjuːb]  英['drɔːtjuːb]
n.  伸缩管

例句

用作名词(n.)
  1. Finally, inside this reflection of the secondary, you can see the focuser drawtube and your eye.最后,在副镜的反射像中,你能看到调焦座的伸缩管和你的眼睛的像。
THE END