阻抗匹配的RS485专用电缆 ZRA-STP-120Ω（for,RS485)one pair 18 AWG-2*1.5MM2)价格 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

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