Dacryocystography was preformed in all patients before operation to confirm the obstructive sity and the size of lacrimal sac.
术
了解泪囊的大小和阻塞的部位，选择最佳手术适应证。
Dacryocystography was preformed in all patients before operation to confirm the obstructive sity and the size of lacrimal sac.
术了解泪囊的大小和阻塞的部位，选择最佳手术适应证。
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