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ASMEB16.5带颈平焊法兰SO美标中石化法兰150LB PN2.0 PN5.0300LB
现N货Q2锌35给水KVP用镀钢管国标薄壁镀D锌管12寸*5.0300镀锌圆
3.81--128L5.0300V10A-位--接线-2P螺钉端子高低3.5式PCB3PKF128H
