The invention relates to a method to make a rectangular steel pipe, specially a rectangular steel pipe with a sharp Angle by cold bend molding.
2
本发明的冷弯型钢外圆尖角的冷弯成型方法，属于冷弯成型技术领域。
The invention discloses a cold bend forming method of an excircle sharp angle of cold bend section steel, belonging to the technical field of cold bend forming.
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