应用光一电检测方法测量气一固两相流中固体微粒浓度、速度，是一种十分有效和可行的方法。
The optical-electrical measurement is an effective and feasible way to measure solid particle concentration and velocity in gas-solid two phase flow.
本文介绍了两相流的相关理论与知识，就气固多相流浓度测量技术进行了理论综述，并对现有的气固多相流浓度测量设备做了介绍。
This paper introduced the theory and knowledge about two phase flow, and summarized the techniques and instruments of measuring concentration of Gas-Solid multiphase flow.
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