duct void examination by vacuum pressure test

例句：

1. 1. The duct is responsible for carryingthe air from the furnace to the room.
   这个管道负责将空气从炉子输送到房间。
2. 2. The duct was designedto distribute heat evenly throughout the building.
   这个管道被设计来在整个建筑中均匀地分布热量。
3. 3. The ductworkwas carefully installed to ensure proper flow ofair.
   管道布局被仔细安装，以确保空气的适当流动。