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3Â¥: Originally posted by pippi6 at 2013-08-18 04:53:34
(1)  kMc/sec=kilomegacycles per second, ÊÇÆµÂÊ£¬http://en.wikipedia.org/wiki/Hertz
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4Â¥: Originally posted by Ê®ÄêÄ¥Á· at 2013-08-18 09:15:46
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