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
1.     .  
   ,    
.     
.       
.
2.     , , , 
       
.
3.     .
  ,      
.
4.  
 .    0 40°.
 20° 60°.
5.       ,
 .
6.        
, .
7. .
8. ,
.
9. .
10.          . 
   ,   
. .


