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3Â¥: Originally posted by jpchou at 2014-05-28 18:30:34
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ÒòžéˆDÖÐµÄ u ÊÇÏ£ÅD×Öĸ u£¬¶ø·ÇÓ¢ÎÄ×Öĸ u
1 nm = 10A;  1.2 nm=12 A
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