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27


















































                                                  G






                                                                                 	7
                    X
                   $      2.14         
  *(         
3  !67    5(    J   * 
   A  H+  F,  G:  5 *(
                               	7
                                              )

                               )          (Borror et al. 1989)
















                   $X     2.15    L 
   
Y# 	
4        (  Y
  ("  (  # 
  ( 4!      /"    % 7 5  &  ,

                              (Borror et al. 1989)
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