gas analysis recorder

例句：

1. 1.The gas analyzer was used to detectthe presence of harmful chemicals in the air.
   气体分析仪被用来检测空气中有害化学物质的存在。
2. 2.The gas analyzer recorder was usedto monitor the concentration of carbon dioxidein the exhaust gases.
   气体分析仪记录仪被用来监测废气中二氧化碳的浓度。
3. 3.The gas analyzer recorder was usedto provide data for the company'senvironmental impact assessment.
   气体分析仪记录仪被用来提供公司环境影响评估的数据。