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在锅炉效率试验中需要查较多的物性参数表的数据，常用的直线内插祛，使用在较小的范围内最适用的，但使用在间隔较大的曲线分布的数据表上精确度不高，而且比较麻烦，不慎还会出错，为此作者根据数据实际变化规律推导高精度的拟合式。
In the boiler efficiency test need to check the more physical properties of the data table, the commonly used linear interpolation remove the use of a small range of the most suitable, but the use of the distribution curve of the larger spacing of the data table accuracy is not High, and more troublesome, inadvertently will make mistakes, for which the author deduced high-precision fitting according to the actual variation of data.