The interference of pulsating flow is usually meeting in natural gas flow measurement.

在天然气流量测量中常常遇到脉动流的干扰。

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This article describes on line proving of natural gas flow meters by using sound speed nozzles.

本文叙述了用音速喷嘴在线标定差压式天然气流量计。

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The result of program operation shows the calculating result satisfies the requirements of natural gas flow state and measurement error analysis to the system.

程序运行表明，计算结果满足该系统对天然气流动状态及计量误差分析的要求。

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To do so, fracking actually cracks the rock to allow for the natural gas to flow from the shale into the well.

FORBES: China Closer To Joining Shale Gas Fracking Craze

In this process, after a well is drilled, pressurized water is injected into the well to fracture the shale and open fissures that enable natural gas to flow more freely out of the well.

FORBES: Chesapeake Good For $38 But Faces Big Fracking Headaches

Without fracking, natural gas does would flow to the well properly, making it too time consuming and costly to be of any commercial value.

FORBES: China Closer To Joining Shale Gas Fracking Craze