DTTB is the important part of Chinese radio and TV integrated coverage system.

地面数字电视广播系统是我国广播电视综合覆盖体系中的重要组成部分。

youdao

DTTB is the important part of Chinese radio and TV integrated coverage system.

地面数字电视广播系统是我国广播电视综合覆盖体系中的重要组成部分。

youdao