The calculation formula of flexural load capacity of steel beams is obtained by using the error transfer formula of mathematical statistics.
运用数理统计学的误差传递公式，推导出了钢梁截面抗弯承载力统计参数的计算公式。
Take the first cross section as an example, and the calculation formula of flexural capacity of composite beams is obtained by using the error transfer formula of mathematical statistics.
运用数理统计学的误差传递公式，推导出了组合梁截面抗弯承载力统计参数的计算公式（以第一类截面为例）。
The section relative uncertainty caused by precision was analyzed and relative uncertainty caused by accuracy based on the error transfer formula was isolated.
分段统计精密度引起的相对不确定度， 剥离出准确度引起的相对不确定度。
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