同义词
1)line of principal stress,枝力轨迹2)trajectory of principal stress,枝力轨迹3)principal stresses,枝力4)Branch ability,成枝力5)evergreen broad-leaved forest,萌枝力6)principal plane of stress,枝力平面7)principal stress axis,枝力轴8)principal stress direction,枝力方向9)principal stress method,枝力法10)principal stress moment,枝力矩
