Dacryocystography was preformed in all patients before operation to confirm the obstructive sity and the size of lacrimal sac.
前造影
了解泪囊的大小和阻塞的部
，
择
佳手
应证。
Dacryocystography was preformed in all patients before operation to confirm the obstructive sity and the size of lacrimal sac.
前造影了解泪囊的大小和阻塞的部，择佳手应证。
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