纯音听力阈值
Pure tone hearing threshold
以上为机器翻译结果，长、整句建议使用 人工翻译 。
观察术前骨气导阈值，听骨链改变，手术前后纯音听力改变。
Observation measures were bone conduction thresholds, changes of ossicular chain, preoperative and postoperative changes of pure-tone hearing.
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