hc1 -       
   h1;  
  hc2. 
     
     
    
 .

    
     l <= 3h1,   
 -  l <= 5h1


:

2-  , 
 2-    
h1 <= 150  h2 <= 150,                             
     l ,

   hc    
  ,                         hc=(hc1 + hc2) / 2

   2rc   
    ,            2rc = r01 + r02

   2rc,x   hx,, 
   ,                      2rcx = 2rc(hc - hx) / hc
