Then we can take the derivative of that quantity, when we vary the temperature, holding the volume constant.
即恒定体积，改变温度，这里恒定温度下。
When remelted temperature and holding time are constant, with the increment of number times of extrusion the crystal grain becomes small.
当加热温度和保温时间一定时，随着挤压次数的增加，二次加热组织的晶粒尺寸减小。
When the preformed Magnesium alloy's texture was globalizing, there were two important control factors, which were holding temperature and holding time, affecting the globalization processing.
等温温度和保温时间是形变镁合金组织球状化的两个重要控制因素。
The results show that when the brazing temperature is lower or the holding time is shorter, the metallurgic reaction is not strong and the connection is not tight;
结果表明，钎焊温度过低或保温时间过短，钎料与母材相互冶金作用较弱，接头性能较差；
The results show that when the brazing temperature is lower or the holding time is shorter, the metallurgic reaction is not strong and the connection is not tight;
结果表明，钎焊温度过低或保温时间过短，钎料与母材相互冶金作用较弱，接头性能较差；
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