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3\u3001\u957f\u5ea6\u5355\u4f4d\u662f\u6307\u4e08\u91cf\u7a7a\u95f4\u8ddd\u79bb\u4e0a\u7684\u57fa\u672c\u5355\u5143\uff0c\u662f\u4eba\u7c7b\u4e3a\u4e86\u89c4\u8303\u957f\u5ea6\u800c\u5236\u5b9a\u7684\u57fa\u672c\u5355\u4f4d\u3002\u5176\u56fd\u9645\u5355\u4f4d\u662f"\u7c73"(\u7b26\u53f7"m")\uff0c\u5e38\u7528\u5355\u4f4d\u6709\u6beb\u7c73(mm)\u3001\u5398\u7c73(cm)\u3001\u5206\u7c73(dm)\u3001\u5343\u7c73(km)\u3001\u7c73(m)\u3001\u5fae\u7c73(&mu;m)\u3001\u7eb3\u7c73(nm)\u7b49\u7b49\u3002hm\uff0c\u5373\u201chundredmeters\u201d\uff0c1hm=100\u7c73\u3002<\/p>\n

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