阿波罗制导与导航信息
Apollo Guidance and Navigation Information
北京四维图新导航信息技术有限公司
Beijing Si-wei-tu-xin Navigational Information Technology Limited Company
navinfo co.
Ltd.
china navinfo ltd.co.
13 floor Hongyu Building 7 Xueyuan Road Haidian District Beijing
100083
导航标志
leading mark
range marker
clear mark [= clearing mark
导航信号模拟器
navigation signal simulator
导航信号增强平台
navigation augmentation platform