... 自然水深：Natural Depth 自然缺陷：natural defect 自然排风：natural ventilation ...
基于38个网页-相关网页
... 外观缺陷Open defect 天然缺陷Natural defect 槽沟Flute ...
基于6个网页-相关网页
·2,447,543篇论文数据，部分数据来源于NoteExpress
This hole is either a heart defect (atrial septal defect) or an enlarged natural opening (foramen ovale) that is supposed to close soon after birth.
CNN: Tricuspid atresia
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