短语词组短语negative ovality 负椭圆度inside ovality 内壁椭圆度positive ovality 正椭圆度ovality y 椭圆度zero ovality 零椭圆度ovality detail 卵形度frame ovality 肋骨椭圆度initial ovality 初始椭圆度groove ovality 孔型椭圆度ovality factor 椭圆度系数 返回 ovality