Construction structure square and rectangle hollow section steel tubes
Szie :8*8----600*600 mm(Square pipe),15mm*20mm-400mm*600mm(Retangle pipe)
W.T:0.3mm-19mm
Standard:JIS,ASTM,EN,BS,DIN...
Material:SS400,S20C,Gr.65,1020,S253JR,C22E...
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