初始椭圆度 ovality: (活塞)椭圆度; 卵形度; 椭园度; 椭圆度frame ovality: 肋骨椭圆度negative ovality: 负椭圆度positive ovality: 正椭圆度zero ovality: 零椭圆度下载手机词典可随时随地查词查翻译