... kindsof ECG / fetal monitor machines, such as Aspel, Burdick, Siemens, Biosys, Cardioline,Corometrics, Dr. Lee, Fukuda, Hellige / Arquette, Huntleight, Hewlett Packard ... ,Biosys / Intermed, Kenz-Suzuken, Marquette, Mortara Rangoni, Nihon Kohden,Quinton, Schiller, ...