单词	双龟目
释义	同疑龟目--双龟目
随便看	center of ring center of rises center of rises-- pressure-rising center--anallobaric center center of rotation center of rudder force center of rudder pressure center of shear center of sheet center of similarity center of similarity ; center of similitude center of similitude center of similitude--center of similarity center of span center of specialization center of sphere center of spherical curvature center of stress center of supply center of surface center of suspension center of symmetry center of the earth center of the photograph center of thrust center of tire contact