Several groups of thermal balance equations for a helicopter gear transmission system are builtup by thermal network method.
以某直升机齿轮传动系统为研究对象，用热网络法建立了该传动系统的热平衡方程组；
2
The circular ground built-upgear hob, designed by combining the superiorities of products from different countries shows its advantages over the integral hob in volume production .