双拼工字钢截面，在CAD中绘图保存为dxf格式，用截面计算器导入DXF文件，计算出错误如下： Tolerance [1.000] is too large.It should be less than the half of the length [1.719] of the shortest
Tolerance [1.000] is too large.
It should be less than the half of the length [1.719] of the shortest
双拼工字钢截面，在CAD中绘图保存为dxf格式，用截面计算器导入DXF文件，计算出错误如下： Tolerance [1.000] is too large.It should be less than the half of the length [1.719] of the shortest
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