automatic ash recorder

例句：

1. 1. The automatic ash recorder is used to measure the amount of ash in the exhaust gases.
   自动灰度记录器用于测量废气中的灰分含量。
2. 2. The technicians use the automatic ash recorder to monitor the levels of pollutants in the air.
   技术人员使用自动灰度记录器监测空气中污染物的水平。
3. 3. The automatic ash recorder is a crucial tool for environmental monitoring.
   自动灰度记录器是环境监测中的关键工具。