Öèòèðóþ:Âîò âðîäå ïðèáîð, êîòîðûé ïîõîæ íà òîò, êîòîðûì ìíå ñëóøàëè ñåðäöå: http://www.spoonermedical.com/Dopplers/Dop_Fetal2.htm