For incompressible fluids, both the mass flux and the volume flux are constant in a tube of flow.

对于不可压缩的流体来说，流管中的质量通量和体积通量都是恒定不变的。

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The measurement error of Coriolis mass flow meter is based on the vibration characteristics of the elastic tube of flow meter.

弹性测量管的振动特性决定了科氏质量流量计的测量精度。

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The sample was then exposed to a magnetic field applied parallel to the direction of flow of blood via a coil around the edge of the test tube.

然后，将样品放置在通过缠绕在试管边缘的线圈而产生的磁场中，该磁场的方向与血液流动方向相同。

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But the anti-Avanti coalition of environmentalists insists that a second tube will not - as its proponents argue - improve the trans-Alpine flow of traffic.

BBC: St Gotthard tunnel fire