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【圖解】捷法─從磁偏角求取正北/真北度數! |
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发表于 2010-1-27 13:34:00
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发表于 2010-1-27 13:44:38
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发表于 2010-1-28 17:50:01
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发表于 2010-3-11 13:01:42
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问磁偏角
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发表于 2010-3-19 12:34:16
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发表于 2010-4-1 13:19:06
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发表于 2010-4-7 11:17:51
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