常見例句雙語例句Research on the 1985 National Elevation Datum and the results obtained are highlighted.闡述了1985國家高程基準研究工作和成果。Actually, floating datum is still horizontal datum, but the datum elevation of different CMP is variable.實際上浮動基準面還是水平基準面,只是不同CMP的水平基準面高程可以變化。The Beijing Fundamental Bench Mark(BFBM) is an important reference datum in the elevation control network in China.北京水準原點是我國高程控制網(wǎng)中的一個重要基準點。 返回 elevation datum