“访客对讲系统”的概念、定义、翻译、参考文献-科学参考

单词	访客对讲系统
释义	访客对讲系统 Encyclopedia 工学〔安全防范自动化系统〕释 visitor intercom system访客对讲系统安装在住宅、楼宇及要求安全防卫场所的出入口，室内人员根据与入口处访客的对讲情况来给访客电控开门的系统。
随便看	closed disk closed domain closed drain system closed-easy-axis closed economy closed ecosystem closed edge sequence closed edge train closed elastic drive closed element closed embedding closed-end fund closed equivalence relation closed expression closed extension closed family of sets closed field closed filament closed filter closed fishing areas closed fishing season closed-flux device closed fork mounting closed form closed-form number

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。