Can i partially close the damper on my wood - burning fireplace so less air goes up the chimney 为了减少通过烟囱的空气，我能够将空气阀部分关闭？
An overall air control for each pipe in each room is available by fitting an air valve at the hot water supply 把空气阀安装在温水供给器时可综合处理各房间管路内的空气。
Valves for water supply - fitness for purpose requirements and appropriate verification tests - air valves 供水系统用的阀门.产品与用途要求的适用性和合适的验证试验.空气阀
The u . s . module ' s airlock and the american space suits had been contaminated by debris , but the portal has been repaired since then , and new u . s . suits sent up 美国太空舱空气阀和美国宇航服被碎片污染了，但是从那时，入口被修好了并且美国宇航服被送上来了。
