secondary front

Billet temperature field and temperature gradient in the front of solidifying shell have been computed in condition of 2.4m/min casting speed for different secondary water strategy.

计算了小方坯连铸机在2.4m/min拉速、不同二冷配水下铸坯的温度场和凝固前沿温度梯度。

Successive positions of the wave front are then given by the envelopes of the secondary waves.

因此波前的相继位置即为次波的包络面.

The field test result of the maintaining terminal shows that it is an effective and satisfying way to the debugging and on line maintenance in the unmanned monitoring system of telecommunication equipment and environment. The System of Automatic Monitor of Secondary Front End

现场的实际试运行情况表明，该维护终端技术的引入不仅大大提高了通信机房无人值守系统的技术水平，同时也为系统工程实施中的安装调试和日常在线维护提供了高效便捷的手段与工具

Increasing the exit-pressure and the mass-rate ratio, the temperature in front of the secondary firebox increases, the length of the secondary firebox when the fuel is burnt out decreases, the combustion efficiency increases.

增大出口反压及空燃比，补燃室头部的温度增大，燃料完全燃尽所需的补燃室长度减小，燃烧效率提高；

Conclusion: It is suggested that the patients with Ann ⅲ osseous malocclusion in early stage of secondary dentition can be treated by the front orthoterion.

结论：在临床上对安氏Ⅲ类错牙合患儿应用前方牵引的年龄选择上，不应局限于替牙期，恒牙列早期的患儿也完全可以应用。