中耳不张是一种常见的中耳疾患，其发病机制与咽鼓管功能障碍(ETD)有关。
Middle ear atelectasis is one kind of common middle ear diseases, its pathogenesis related to eustachian tube dysfunction (ETD).
中耳不张是一种常见的中耳疾患，其发病机制与咽鼓管功能障碍(ETD)有关。
Middle ear atelectasis is one kind of common middle ear diseases, its pathogenesis related to eustachian tube dysfunction (ETD).
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