The dangerous type chronic otitis media occurs with pars flaccida and marginal perforations.

慢性中耳炎的危险型可出现鼓膜松弛部的穿孔和鼓膜边缘性穿孔。

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The dangerous type chronic otitis media occurs with pars flaccida and marginal perforations.

慢性中耳炎的危险型可出现鼓膜松弛部的穿孔和鼓膜边缘性穿孔。

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