123B/124B/125B Users Guide The Meter Recorder tends to make the Test Device work as a paperless recorder that collects a series of parameter measurements with time and demonstrates The end result to be a graph or a pattern-line on display. This is certainly most handy to..V?i nhi?u s? ti?n ích, m?i l? và ??c ?áo trong ch?t l??ng d?ch v?. 123B hy