                      .

	  ,    
 .       
 .
	    ,    

-----------------------------------------
| ........(,,).....                 |
| -.....(,,)....                 |
| ..(,,).                 |
|............                 |
|.................                 |
|................                 |
|  ....                 |
|  .....                 |
-----------------------------------------

F1  F2/+  F10 

             
.       
,      .
 (,,)      ,   
      
.        "-",  
,         
 .      "" :
60,05,51 -         
  ,       :
-,60,05,51 -         ,
    .
           "+"  F2   
          , 
    .
         ""  ""  
        
.