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(\u4e2d\u56fd\u6807\u51c6)\u3002\u6807\u51c6\u7b26\u53f7n mile\u3002\u300a\u4e2d\u534e\u4eba\u6c11\u5171\u548c\u56fd\u6cd5\u5b9a\u8ba1\u91cf\u5355\u4f4d\u300b\u6240\u7528\u7684\u7b26\u53f7\u662fn mile\u3002\u5b83\u7b49\u4e8e\u5730\u7403\u692d\u5706\u5b50\u5348\u7ebf\u4e0a\u7eac\u5ea61\u5206\uff08\u4e00\u5ea6\u7b49\u4e8e\u516d\u5341\u5206\uff0c\u4e00\u5706\u5468\u4e3a360\u5ea6\uff09\u6240\u5bf9\u5e94\u7684\u5f27\u957f\u3002<\/p>\n<p>\u6269\u5c55\u8d44\u6599\uff1a<\/p>\n<p>1\u6d77\u91cc=\u5b50\u5348\u7ebf\u957f\u5ea6\u7684\u4e24\u500d\u00f7360\u00f760\u22481852.25-9.31cos(2\u03a9m)\u3002\u03b4\u662f\u7eac\u5ea6\u3002\u5f53\u03b4=0\u5ea6\uff0c\u5373\u5728\u8d64\u9053\u4e0a\u65f6\uff0c1hl\u7684\u957f\u5ea6\u6700\u77ed\uff0c\u4e3a1842.94m\uff1b\u5728\u4e24\u6781\u6700\u957f\uff08\u03b4=90\u5ea6\uff09\uff0c\u4e3a1861.56m\u3002\u7ea6\u572844\u5ea614\u5206\u5904\uff0c1n mile\u7684\u957f\u5ea6\u7b49\u4e8e1852m\u3002\u8fd9\u662f\u76ee\u524d\u6211\u56fd\u548c\u4e16\u754c\u4e0a\u5927\u591a\u6570\u56fd\u5bb6\u91c7\u7528\u76841929\u5e74\u56fd\u9645\u6c34\u6587\u5730\u7406\u5b66\u4f1a\u8bae\uff08International Extraordinary Hydrographic Conference\uff09\u901a\u8fc7\u7684\u6d77\u91cc\u7684\u6807\u51c6\u957f\u5ea6\u3002<\/p>\n<p>1\u6d77\u91cc=1.852\u516c\u91cc(\u5343\u7c73) 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