“1985 national height datum”的概念、定义、翻译、参考文献-科学参考

单词	1985 national height datum
释义	1985 national height datum Encyclopedia 工学高程控制网释 1985 national height datum1985国家高程基准采用青岛水准原点和根据青岛验潮站1952～1979年潮汐观测数据确定的黄海平均海面所定义的高程基准。1988年1月1日启用。
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