... products adopt the most advanced international technology of digital video and optical fiber transmission, performing synchronous, undistorted, uncompressed ... and low residual pressure (series) Ground resistance/diameter: ≤4Ω/ 2.5m Executive standard: GBl8802.1,lEC61643-1 Other ... 15/EN55022,Class A&B IEEE1613(electric substation),EN50121-4(traffic track) Order Information (Packed in standalone and ...