Inner canthal ligament projects on the middle of the lacrimal sac, almost equal to the level of common lacrimal canaliculus.

内眦韧带横压于泪囊的中部，几乎与总泪小管平行。

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Inner canthus ligament almost projected on the middle of the sac.

内眦韧带几乎横压于泪囊中部。

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Aim:To seek the landmark of bony semicircular canal and inner lymph sac.

目的：寻找乙状窦前入路中骨性半规管的轮廓化方法和内淋巴囊的识别标志。

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