1. 进气：air admission valve 进气阀 | air admission 进气 | air alarm 空袭警报
2. 空气进入：air activity 空中活动 | air admission 空气进入 | air and water heater, combined 空气加热器和热水器,组合的
3. 补气：卡门涡Karman vortex23.102 | 补气air admission23.103 | 飞逸转速runaway speed23.104
1. Measures to attract visitors include free admission to tourist sites, expanded air service and reduced prices for hotels and transportation.
2. The package includes air tickets and hotels, as well as admission to major scenic spots.