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draw tube
agric. 显微镜活镜筒; 抽筒
plast. 伸缩管
tech. 镜筒; 套筒
draw-tube ['drɔ:tju:b]
gen. 显微镜等中的活镜筒
oil 伸缩管
draw tube: 7 phrases in 4 subjects
Metallurgy2
Technology3
Textile industry1
Wind Energy1