A B 普通精度较高精度 I x I y r x r y Wx Wy I t /cm
4 Wt /cm
3
### 1.338 1.705 5.502 1.875 1.796 1.048 2.200 1.500 4.534 2.780
### 1.650 2.102 6.653 2.253 1.779 1.035 2.661 1.802 5.519 3.406
### 2.817 3.589 11.296 5.050 1.774 1.186 4.518 3.366 11.666 6.470
### 3.303 4.208 12.827 5.696 1.745 1.163 5.130 3.797 13.401 7.509
### 4.197 5.347 15.239 6.682 1.688 1.117 6.095 4.455 16.244 9.320
### 3.210 4.089 17.9