Acta Physica Sinica
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Acta Phys. Sin.  2002, Vol. 51 Issue (6): 1398-1402    
GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS Current Issue| Next Issue| Archive| Adv Search  |   
Shi Wang-Lin1, Song Tai-Peng2, Hou Chen-Xia2
(1)北京师范大学物理系,北京100875; (2)南阳师范学院物理系,南阳473061
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