Dacryocystography was preformed in all patients before operation to confirm the obstructive sity and the size of lacrimal sac.
前造影以了
泪囊
大小和阻塞部位，以选择最佳手
证。
成品Dacryocystography was preformed in all patients before operation to confirm the obstructive sity and the size of lacrimal sac.
前造影以了泪囊大小和阻塞部位，以选择最佳手证。
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