- electronicstethoscopeelectronicindustrialstethoscoperesophageal-cheststethoscopeHeinventedanewtypeofstethoscope.Thestethoscopeisamedicalinstrument.Next,shelistenedtomyheartwithastethoscope.Thenthedoctorlistenstohischestwithastethoscope.Studyonsterili...
- 20199