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国际协议原点
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Conventional International Origin; CIO
国际协议原点
由国际纬度局5个极移监测站在1900~1905年间获取的天文纬度观测数据所确定的固定平极。又称国际习用原点。
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全称:Conventional International Origin。缩写:CIO
国际协议原点
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