不锈钢天沟怎么找坡？ 0.5-3mm 澳门12码

p1Src=//y3.yzimgs.com/uploads_old/373932/2014082809585049_old.jpg&p2Src=//y3.yzimgs.com/uploads_old/373932/2014082809585049_old_1.jpg&p3Src=//y3.yzimgs.com/uploads_old/373932/2014082809585049_old_2.jpg