... seamless square tube 无缝方管》 welded square pipe 焊接方管 Rectagular Steel Tube 矩形管》 ...
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A deformation way from round welded pipe to square one is introduced.
介绍了一种由圆形焊管变方形焊管的变形方式。
In order to change the situation a plan to develop square H. F. welded pipe used in container has been put forward.
为改变这一现状，国家提出国内焊管行业开发集装箱用方矩形高频焊接钢管的计划。
This paper introduces the producing and technology characteristics of the square and rectangular double-welded seam pipe. And designing of the pass parameters of the cold-bent channel steel.
介绍了双焊缝方矩形钢管生产技术的特点及冷弯等边槽钢孔型设计参数。
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