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JOINING DEVICE OF STEEL FRAMED COLUMN CONSISTING OF ENCLOSED SECTIONAL MEMBER AND STEEL FRAMED BEAM?keyword=JOINING DEVICE OF STEEL FRAMED COLUMN CONSISTING OF ENCLOSED SECTIONAL MEMBER AND STEEL FRAMED BEAM?keyword=JOINING DEVICE OF STEEL FRAMED COLUMN CONSISTING OF ENCLOSED SECTIONAL MEMBER AND STEEL FRAMED BEAM?keyword=JOINING DEVICE OF STEEL FRAMED COLUMN CONSISTING OF ENCLOSED SECTIONAL MEMBER AND STEEL FRAMED BEAM 专利,更快更准确