gross vacuum measurement

例句：

1. 1.The engineer used a gross vacuum measurement to test the air filter's efficiency.
   工程师使用粗真空测量来测试空气过滤器的效率。
2. 2.The company conducted a gross vacuum measurement to ensure the cleanliness of their factory.
   公司进行了粗真空测量，以确保工厂的清洁度。
3. 3.During the vacuum cleaning process, the technician used a gross vacuum measurement to remove dust and debris from the carpet.
   在吸尘器清洁过程中，技术员使用了粗真空测量来从地毯上清除灰尘和碎屑。