“national astro-geodetic network”的概念、定义、翻译、参考文献-科学参考

单词	national astro-geodetic network
释义	national astro-geodetic network Encyclopedia 工学大地起算数据释 national astro-geodetic network国家天文大地网在中国领土范围内，由互相联系的大地测量点（简称大地点）构成的网，大地点上设有固定标志，以便长期保存和使用。简称国家大地网。建立国家大地网的经典方法是边角测量，需要采用天文观测方法测定天文经纬度和方位角，所以又称为天文大地网。
随便看	Helmholtz-Kelvin contraction Helmholtz-Kelvin theory helmholtz-kelvin time scale Helmholtz-Ketteler dispersion formula Helmholtz-Ketteler formula Helmholtz-Lagrange theorem Helmholtz layer Helmholtz reciprocity theorem Helmholtz representation helmholtz resonance sound absorber Helmholtz resonator Helmholtz reversion theorem Helmholtz's equation Helmholtz's reciprocity theorem Helmholtz theorem Helmholtz theorems Helmholtz time scale Helmholtz’s vorticity-tube theorems helminth helminthiasis Helms-Burton Act Helmut Baierl Helmut Lachenman Helmut Moritz Helmut Newton

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