在成型和定径时运用成组技术，可用一套开口孔型辊、定径辊生产一组外径相近的焊管。
With the grouping technique it is allowed to produce a group of tube sizes with similar O.
无缝钢管经过三辊定减径机轧制生产工序后，有时会产生弯曲，影响产品质量和深加工。
The product quality and further processing are affected by the curvature of seamless steel pipe caused during rolling through the three-roll size reducing mill.
重点介绍了三辊可调式减定径机机芯部分工作原理及应用。
This paper introduces the working principles and application of the module of the adjustable three-roller rolling mill.
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