February 26.1985-Japan developed the world's first artificial middle ear
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In (Yi Chou, the first month, seventh day), February 26, 1985, Japan developed the world's first artificial middle ear.
1985 2 26 Japan Ehime University School of Medicine developed the world's first artificial middle ear the (embedded ultra-small hearing aids), and successfully made for a right ear can not hear the voice of patients set artificial middle ear surgery.
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