单词principal plane
un.: 主平面；轴平面
网络: 坐标系主平面；像主平面；纸面
轴平面
主平面
Locating the Orientation of the Corresponding Relationship Between Principal Stress and Principal Plane and Its Mathematics Certification
主应力与主平面对应关系的判定及其数学证明
accumulation sedimentation method angle between failure plane and major principal plane
破坏面与大主平面的夹角