广州550*550mm格构柱,Q355B立柱桩, 钢立柱,广州钢管桩厂家,广州格构柱厂家,广州钢构柱厂家,400*400mm格构柱,480*480mm格构柱,440*440mm格构柱,530*530mm格构柱,540*540mm格构柱,650*650mm格构柱,620*620mm格构柱,广州 深圳 珠海 中山 东莞格构柱厂家,Q235B格构柱,Q355B格构柱,角钢180*16mm,缀板480*300*16mm
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