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In the early 19th century, a French surgeon Rene Theophile Hyacinthe Laennec discovered that running barefoot is also easy to hear internal disturbance using a esophagus. At first, he made the good improvised tube […]
In the early 19th century, a French surgeon Rene Theophile Hyacinthe Laennec discovered that running barefoot is also easy to hear internal disturbance using a esophagus. At first, he made the good improvised tube […]