A method that is used to monitor water flow in the bottom of drain sand pipe is designed.

设计了一种通过监测排砂管线底部水流量来估算地层出水量的方法。

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Large diameter GRP sand pipe used in Changjiang Water Diversion Project (III) is paved for the first time in the soft ground.

长江引水三期工程采用大口径玻璃钢夹砂管，是首次在软土地基上敷设。

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According to different casting methods, divided into continuous cast iron pipe and the centrifugal cast iron pipe, wherein the centrifugal cast iron pipe is divided into two types of sand and metal.

按铸造方法不同，分为连续铸铁管和离心铸铁管，其中离心铸铁管又分为砂型和金属型两种。

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