In accordance with the liquid temperature selection in winter, current density, summer with the lower limit.
依液体温度选择电流密度，冬季用下限，夏季用上限。
The lower limit of temperature at which this occurs is known as the softening point or critical temperature.
呈现这一性质的温度下限称为软化点或临界温度。
Nine, the upper limit temperature alarm function, temperature alarm function, the upper / lower limit temperature can be set;
温度上限报警功能， 温度下限报警功能，上/下限温度可设定 ；
The main conclusion is that: When the temperature field in the crack surface is uniform, the energy release rate will decrease with time, until it reaches a lower limit value.
其主要结论是：当裂纹面内的温度埸恒定时，能量释放率将随时间而减少，直至某一较低的极限值。
When temperature is less than lower limit, calefaction circuit starts.
温度低于下限，启动加热。
When temperature is less than lower limit, calefaction circuit starts.
温度低于下限，启动加热。
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