The process, with constant and minimum elongation of strip steel edge, can meet the requirements of expanding varieties and sizes with higher welding speed.
该法可使带钢边部的伸长量最小和尺寸处于稳定状态，并可满足扩大中小径直缝电焊管的规格品种和提高焊速的要求。
The process, with constant and minimum elongation of strip steel edge, can meet the requirements of expanding varieties and sizes with higher welding speed.
该法可使带钢边部的伸长量最小和尺寸处于稳定状态，并可满足扩大中小径直缝电焊管的规格品种和提高焊速的要求。
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