A clear, cylindrical glass tube usually open at one end and rounded at the other, used in laboratory experimentation.
透明的，圆柱形玻璃管，通常一端开口另一端为圆形，用于实验室实验。
The screw cap is already in place at the top of the tube and the lower end is open for the filling procedure.
螺丝盖子已经在管筒的顶部安装到位，管筒的下端开口以便于填装过程。
The tube silencers 23 have open end portions arranged to face the fan and the silencers of the first set 18 are spaced from the silencers of the second set 24 in both axial and radial directions.
管道消音器(23)具有敞开端部，其被设置为面对风扇，并且第一组(18)的消音器与第二组(24)的消音器沿轴向方向和径向方向分隔开。
The tube silencers 23 have open end portions arranged to face the fan and the silencers of the first set 18 are spaced from the silencers of the second set 24 in both axial and radial directions.
管道消音器(23)具有敞开端部，其被设置为面对风扇，并且第一组(18)的消音器与第二组(24)的消音器沿轴向方向和径向方向分隔开。
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