Butt fusion connection is banned for metallic conduit.

金属导管严禁对口熔焊连接。

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Therefore, the study of Butt Fusion Welding automation devices is necessary.

因此，研究热熔对接焊的自动化装置具有重要意义。

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A control system of a butt fusion welding machine for PE pipe is introduced in this paper.

介绍了一种聚乙烯管道热熔焊机控制系统。

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