名称尺寸惯性矩cml回转半矩cm截面模数cmh×b×c×thbctlxlyrvwxwy100×40×20×2.010040202.060.6217.21.25612.1240100×40×20×2.510040202.573.0520.321.23414.6155120×50×20×2.012050202.0107.7730.511.51917
