由于胎位不正和先露异常引起的梗阻性分娩
Obstructed labour due malpos and malpresentation
非正常正火组织
Microstructure of abnormal normalizing
abnormal normalized structure
非正常正交阵
improper orthogonal matrix
正常分布带
zone of normal distribution
正常分类程序输入程序
normal sort program input procedure
正常正交分解
Proper orthogonal decomposition
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