方法：用咽鼓管导管治疗慢性卡他性中耳炎39例、56耳。

Method: 39 cases of 56 ears suffered from chronic catarrhal otitis media were treated by the eustachian catheter.

youdao

方法：用咽鼓管导管治疗慢性卡他性中耳炎39例、56耳。

Method: 39 cases of 56 ears suffered from chronic catarrhal otitis media were treated by the eustachian catheter.

youdao