QJ 2741-1995 MJ螺纹1100MPa235℃双头螺柱(b,m=1.5d).pdf

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JB T 1308.14-1999 PN 250 MPa双头螺柱 型式、尺寸和技术条件.pdf

QC T 870-2011 双头螺柱 bm=1.25d.pdf

QC T 871-2011 双头螺柱 bm=2d.pdf

QJ 2740-1995 MJ螺纹1100MPa235℃双头螺柱(b,m=1d).pdf

HG T 21573.2-1995 高压螺栓和螺栓液压上紧装置 大直径双头螺柱.pdf

JB T 1308.14-2011 PN2500超高压阀门和管件 第14部分 双头螺柱.pdf

JB T 2773-1992 PN16.0~32.0MPa双头螺柱.pdf

QJ 2742-1995 MJ螺纹1100MPa235℃双头螺柱(b,m=2d).pdf

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