4.1.6热浸镀锌钢管DN60x3.75mm

4.1.5热浸镀锌钢管DN50x3.5mm

4.1.4热浸镀锌钢管DN40x3.5mm

4.1.3热浸镀锌钢管DN32x3.25mm

4.1.2热浸镀锌钢管DN25x3.25mm