The permeability under temperature function of two groups of rock specimens obeys exponential function to increase, and the threshold value of temperature exists.
两组岩样在温度作用下渗透率都服从指数函数增加，并存在温度门槛值。
Tempering temperature remarkably affect the threshold value of fatigue crack propagation.
回火温度对该钢的疲劳裂纹门槛值影响显著。
In the meantime, we get a safe threshold value by experiments. When measured temperature is bigger than safe threshold value, the system will alarm and remind driver to take reasonable steps.
同时，通过实验的方法得到了一个安全门限值，当测得温度大于安全门限值时，系统予以报警，提醒乘务员采取相应对策。
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