title: [Pulse telecounting apparatus for the study of heart rate during work].
mesh_terms: D002309:Cardiology / Q000600:supply & distribution*; D004864:Equipment and Supplies; D006339:Heart Rate; D006801:Humans; D005082:Physical Exertion; D011674:Pulse; D014937:Work
keywords: CARDIOLOGY/equipment and supplies; EXERTION; PULSE