穿孔头前探量
perforation head probe depth
鼻前孔缩窄术
anterior nares constrictor operation
成品前孔
the last hole before finished
骶裂孔前间隙法
Injection of anterior epidural space via hiatus sacrais
骶前孔
Anteriora sacralia foramina
anterior sacral foramina
复习照仪镜头前之装置
device for line variation
孔前流动影响区
contributing flow region in front of orifice