北京水准原点是我国高程控制网中的一个重要基准点。

The Beijing Fundamental Bench Mark (BFBM) is an important reference datum in the elevation control network in China.

youdao

北京水准原点是我国高程控制网中的一个重要基准点。

The Beijing Fundamental Bench Mark (BFBM) is an important reference datum in the elevation control network in China.

youdao