... interface Interface of exterior display: Standard VGA Exterior communication interface: RS422/RS485 Exterior printer interface: Standard combines Record apparatus Record width ... , N, C1,C2,C3,C4,C5,C6) Method of Lead: Ⅰ,,,aVR,aVL,aVF,V1,V2,V3,V4,V5,V6 ⅡⅢWaveform of ...