This method is based on the measurement of the rate of air flow through a given area of fabric by a given pressure difference across the fabric.

这个方法是基于对空气流速的测量：在一块既定面积的面料上，通过面料两边不同的压差来获得。

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Water-flow velocity of continuous measurement was determined by the ratio of count rate value of different source spacing detectors.

连续测量的水流速度是通过不同源距探测器计数率的比值来确定。

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Initially set velocity, density of traffic flow, traffic volume of service and the rate of traffic load as the measurement indicators.

对航道服务水平进行定义，并初步确定速度、交通流密度、服务交通量和交通量负荷比等四项度量指标。

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