intrinsic cartilaginous obstruction eustachian tube
...seous obstruction eustachian tube 咽鼓管骨性梗阻 intrinsic cartilaginous obstruction eustachian tube 咽鼓管内部软骨梗阻 Extrinsic cartilagenous obstruction eustachian tube 咽鼓管软骨外部梗阻 ..
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