50欧姆和75欧姆怎么区分_电缆专卖... 天津市电缆总厂第一分厂

p1Src=//y3.yzimgs.com/uploads/195882/2016113-1824844.jpg?watermark/2/text/5aSp5rSl5biC55S157yG5oC75Y6C56ys5LiA5YiG5Y6C/font/5a6L5L2T/fontsize/400/fill/I0E3QTlBOA==/gravity/SouthEast"

aa