So from that point of view, hot stretch reducing steel pipe completed the transition from the seam to the seamless, the difference between the two is not limited to the above two points, but enough to describe the longitudinal welded […]
So from that point of view, hot stretch reducing steel pipe completed the transition from the seam to the seamless, the difference between the two is not limited to the above two points, but enough to describe the longitudinal welded […]