    50  5  5G     

   8  27    

   27  2019       

    5G    

         

         

    2019    50  5

  5G     

  6  6       

         

           5G

        5G 

       

      5G   

          

         



    7    

     5G   

         

7   37      5G   

          

        

   2019    50  5 

5G    