加热线变化(heating linear change)oC温度下干燥至恒量，测量干燥前、后长度的变化，计算干燥线变化。干燥后的试样，再经加热到规定的试验温度，保温3h，冷却后，.
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N. B. The using temperature of bricks should not exceed the experimental temperature of Linear Change after Heating. The above Heat-Conduction Coefficent is obtained by using flat-plate method.
本试验方法适用于电热合金随温度变化的测量，亦可用于超过电热合金使用温度范围的情况。
N. B. the using temperature of bricks should not exceed the experimental temperature of Linear Change after Heating.
注：砖的工作温度不超过重烧线变化的度验温度。
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