Ⅱ型截面主梁
cross-section main girder
变截面轴
Variable Cross-section Shaft
non-uniform shaft
垂直截面面积
Perpendicular cross section area
二次曲面的主截面
principal section of a quadric
计算截面面积
calculated cross-sectional area
剪力墙截面面积
shear-wall cross-sectional area
截面面积测微仪
Micrometer of cross-sectional area of soft tissue
晶体主截面
principal section of crystal
螺栓有效截面面积
ettectlve cross―section area of bolt
起始横截面面积
original cross sectional area
切屑横截面面积
chip cross-sectional area