Stethoscope is the most commonly used diagnostic tool for internal and external women and children physicians. It is the symbol of physicians. Modern medicine begins with the invention of stethoscope. Stethoscope has been continuously improved since its application in clinical practice on March 8, 1817, but its basic structure has not changed much. It mainly consists of the pickup part (chest piece), the conductive part (hose) and the listening part. (earpieces) composition.
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