Advantages of employment of semi - floating mandrel mill to produce small and medium tubes are elaborated.

提出了小型无缝钢管生产机组选用半浮动芯棒连轧工艺的优势.

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One way is to use a hollow billet and then use a fixed or floating mandrel.

一种方法是使用空心坯,然后使用固定或浮动芯棒.

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