[=between ischial spines]坐骨棘间

[=British Institute of Sewage Purification]英国污水净化研究所

[=between ischial spines]坐骨棘间
[=bispinous or interspinous diameter]两棘突或棘间直径
[=british institute of sewage purification]英国污水净化研究所