Most of the steel for line pipe is made by open-hearth, electric furnace, and basic-oxygen processes.

大部分建管道用管子的钢材由平炉、电炉和碱性顶吹转炉生产。

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Most of the steel for line pipe is made by open-hearth, electric furnace, and basic-oxygen processes.

大部分建管道用管子的钢材由平炉、电炉和碱性顶吹转炉生产。

youdao