It is then able to avoid penetrating the membrane, so avoiding drilling and other debris dropping into the ear.

接着钻头能避免穿破内耳膜，以避免钻头和其它残余物落入内耳中。

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It is then able to avoid penetrating the membrane, so avoiding drilling and other debris dropping into the ear.

接着钻头能避免穿破内耳膜，以避免钻头和其它残余物落入内耳中。

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