Simultaneously, round steel ingots which are used to produce pipes with large diameters and thick walls are provided without modifying roll shapes of rolling pipe piercers.

同时既能提供生产大口径、厚壁管所需的圆钢锭，又不需要对轧管穿孔机的辊型进行修改。

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Simultaneously, round steel ingots which are used to produce pipes with large diameters and thick walls are provided without modifying roll shapes of rolling pipe piercers.

同时既能提供生产大口径、厚壁管所需的圆钢锭，又不需要对轧管穿孔机的辊型进行修改。

youdao