短語詞組短語principal lattice direction 主晶格方向principal strain direction 枝變方向principal visual direction 主要視覺方向greatest principal stress direction 最大主應(yīng)力方向principal axis direction 主軸方向Principal stress direction Angle 主應(yīng)力方向角principal stre direction 枝力方向principal vibration direction 釋義主變更方向approximation principal axis direction 近似主軸方向 返回 principal direction