Received:November 28, 1982  
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Author NameAffiliation
Han Shaocen Chengdu Branch, Chinese Academy of Science 
Zha Xiaoya Huazhong University of Science and Technology 
Wan Honghui Huazhong University of Science and Technology 
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Citation:
DOI:10.3770/j.issn:1000-341X.1985.04.006
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