itantaneous velocity 瞬时速度

itantaneous screw axis 瞬时螺旋轴

itantaneous axis of rotation 转动瞬轴

itantaneous center of rotation 瞬时转动中心

itantaneous center of acceleratio 瞬时加速中心

itantaneous orbit 瞬时轨道

itantaneous axis 瞬轴

itantaneous load 瞬时装载

itantaneous ace 瞬时空间