air defense early warning circle防空: air defense; antiaircraft; a ...预警: early warning圈: circle; ring防空预警: air defence early warning防空预警装置: air defense alerting device下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:防空预警圈，即可在微信中查询翻译
