special alarm专用: special use; for a special p ...报警器: annunciator; alarm; siren; w ...备用报警器: spare alarm专用报警系统: private alarm system私有专用报警系统: proprietary alarm system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:专用报警器,即可在微信中查询翻译