If you want to write a function that describes this line here, it's pressure as a function of volume related to each other with this constant.
如果要写出描述这条等温线的方程，它的压强和体积，就通过常数C相联系起来。
2
A novel AC variable frequency converting control system with multiple functions is introduced. The system is suitable for maintaining constant oil pressure in main line of oil pipelines.
阐述了一种新型多功能交流变频调速控制系统，用于保持油田输油管主干线油压恒定。
3
It is available for the air clean under constant temperature, pressure and high humidity and especially for the air clean under high moisture as medicament filling production line.