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| umbo of tympanic membrane (位于鼓膜外面中心处的凹陷，相当于锤骨柄末端处。 malleolar stria 锤纹 (呈白色，自鼓膜脐向前上方至鼓膜紧张部上缘，是由鼓膜附着于锤骨柄形成的)) | |||
| navel of drum membrane | |||
| umbo of tympanic membrane | |||
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