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Amazon.com: EMI Platinum Series Deluxe Black Cardiology Stethoscope with pressure sensitive Diaphragm ESC-333 : Industrial & Scientific
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Amazon.com: Adult + Pediatric Diaphragm with Rim assemblies. Fits Cardiology III (3) + 2 Extra Ear Pieces. Compatible with Littmann and Other Stethoscopes : Industrial & Scientific
Biomedical Engineers - How Stethoscopes Work? Sound has been used as a diagnostic tool for millennia. You can learn a lot with an ear to a person's chest -- that the heart
Why is most of the chest piece in the stethoscope in a circular shape? Will it work if it is designed in some other shape? - Quora
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