flame manometer

例句：

1. 1.The flame manometer was used to measure the temperature of the gas.
   火焰计被用来测量气体的温度。
2. 2. The flame manometer was used to detect the presence of combustible materials in the air.
   火焰计被用来检测空气中可燃物质的存在。
3. 3.The flame manometer was used to measure the pressure of the gas.
   火焰计被用来测量气体的压力。