open tube meaning in English

开管
开口管，空心管

Experiment study on the determination of cod with the opened tube
开管消解测定法的试验研究
Finite element analysis and stress test for opening tubing connection on pressure vessels
内压容器壳体上矩形大开孔接管三维有限元分析与强度计算
However , if one tube is closed the open tube may become two - way and special traffic control and signs will be used to guide you
不过，如其中一条管道封闭，通车的一条管道便会双程行车，届时会有特别的交通控制措施和标志，指引驾驶人。