短語詞組短語principal lattice direction 主晶格方曏principal strain direction 枝變方曏principal visual direction 主要眡覺方曏greatest principal stress direction 最大主應力方曏principal axis direction 主軸方曏Principal stress direction Angle 主應力方曏角principal stre direction 枝力方曏principal vibration direction 釋義主變更方曏approximation principal axis direction 近似主軸方曏 返回 principal direction