Journal of Zhengzhou University (Engineering Science)[ISSN
                                    1671-6833/CN
                                    41-1339/T] Volume:
                                    23
                                    Number of periods:
                                    2002年02期
                                    Page number:
                                    5-8,30
                                    Column:
                                    
                                    Public date:
                                    1900-01-01
                                
                                
                                    - Title:
 
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                                    - Author(s):
 
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                                    - Keywords:
 
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                                    - CLC:
 
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                                    - DOI:
 
                                    - 
                                        10.3969/j.issn.1671-6833.2002.02.002
 
                                
                                
                                
                                    - Abstract:
 
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