... , the line correlation, the frame correlation, and the linear interpolation, etc.The instrument has such five display modes as B, B/B ... , the perimeter, the heart rate, and the pregnant week (five ways: BPD, GS, CRL, FL, and the AC) and so on; has the Chinese ... SVGA video output may mate with SVGA color monitor. And 2 groups of PAL video output may mate with PAL monitor, video ...