control air valve的用法和样例：
例句
- 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。 - The start is performed by direct injection of air into the cylinders through the starting air valves in the cylinder heads.
这个启动，是由直接注射空气进入气缸，通过在气缸正面的启动空气阀完成的。
