To solve this problem, it is necessary to use such pigging technology that is suitable for the vari-sized pipeline.

要解决这个问题，需采用适应变经管道的清管技术。

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This paper introduced the technology of pigging, diameter measuring & pressure testing for Guangdong LNG trunk-line.

本文介绍了广东液化天然气输气干线工程应用的清管测径试压技术。

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