平面框架结构
plane framework structure
无约束平面框架结构
unrestrained planar frame structure
单层平面钢框架
single-story steel plane frame
平面闭式框架
plane closed-type frame structure
平面不规则框架
non-symmetric planar steel frame structure
承压平面平衡
parting surface support balance
单一平面平衡机
single-plane (static) balancing machine
非定常平面平行运动
unsteady planar parallel flow
刚体平面平行运动
plane motion of rigid body