cable digital TV networking in cities and counties
Digital Cable TV Platform
digital cable TV system
China digital earthquake observation network
China Digital Geospatial Framework
China Digital Seismograph Network
China Digital Seismograph Network CDSN
China Digital Strong Motion Network CDSMN
digital China geospatial framework
digital China geo-spatial framework
geo-spatial framework of digital China
Broadband Digital Cable
Broadcasting for terrestrial digital TV