Norma e020

(1)





 





  



     

          

 

  



   

    

  

  

 

                  

  

 

             

 



   

 





                             

   

(2)

 



_{}



 

                    

  



  _{}

 _{}

  



              _{}





  

 

 _

 _{}

_{}

_

_

        _{}

 

          

      _{}

 _

  

   

  

  



  _

   

(3)

(4)

 



_{}

           

   

   _{}

                  

   

     





                         

  

  

 

     

 __{}

_{}

_{}

_{}_



                   _ 

__

            

__

        _ 

____  

          

(5)





 



 

               

              

     

       



    

  







_

_



  





           

  

 

 

 _



    

   







                    



 



 



    

 

  

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



 



 

    

  



    

  

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