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Received: 1998-03-05;
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Cite this article: |
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$author.xingMing_EN,$author.xingMing_EN,$author.xingMing_EN. [J]. Modern Physics, 1999, 11(01): 37-38.
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| [1] |
. [J]. Modern Physics, 1999, 11(04): 32-32. |
| [2] |
. [J]. Modern Physics, 1997, 9(04): 31-32. |
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