阻抗匹配的RS485专用电缆 ZRA-STP-120Ω(for,RS485)one pair 18 AWG-2*1.5MM2)高清大图 阻抗匹配的RS485专用电缆 ZRA-STP-120Ω(for,RS485)one pair 18 MKVV|天津市电缆总厂第一分厂