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Ningbo Gillsen Electronic
 
作者:宁波万网网络 • 发布时间:2015-08-18      



 Ningbo Gillsen Electronic

The ear has three main parts: the outer, middle, and inner ear. The outer ear (the part you can see) opens into the ear canal. The eardrum separates the ear canal from the middle ear. Small bones in the middle ear help transfer sound vibrations to the inner ear.




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