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为解决一系列工程及材料学问题,常要知道不同材料的线膨胀温度系数(TKJIP),其误差对百分度温度范围要求达到(2～3)×10~(-8)开~(-1)。这样的精度只有用高精度的膨胀计才能得到。所有用于科学及工业上的膨胀计根据线膨胀温度系数的测量
In order to solve a series of engineering and material science problems, it is necessary to know the coefficient of linear expansion of different materials (TKJIP), the error of the percentage of temperature range required to achieve (2 ~ 3) × 10 -8 open ~ (- 1). This accuracy can only be obtained with a high-precision dilatometer. All scientific and industrial dilatometer based on linear expansion temperature coefficient of measurement