firing system的用法和样例：
例句
- Another early approach to controlling exhaust emissions was the engine modification, or controlled-combustion system.
另一种早期的控制排气污染的途径是发动机调整或控制燃烧系统。 - Some new constructions and technology which are applied to the design of furnace construction and combustion system are introduced, and the application effect is analysed.
介绍了蓄热式加热炉炉型及燃烧系统设计中采用的一些新结构及新的技术手段，并对效果进行分析。
