发明授权
US09205475B2 UOE steel pipe and structure 有权
UOE钢管和结构

UOE steel pipe and structure
摘要:
A UOE steel pipe used to form a structure by performing butt circumferential welding and having an outside diameter shape in a waveform in a longitudinal direction is shaped to have no local minimum of the outside diameter shape in the waveform within a predetermined length from both longitudinal end portions.
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