    l <= 3h,   -  l <= 5h.
   hc  l ( rcx = 0)  
     :

h = (hc +0,12l) / 1,07


:

2-  ,  
 2-    
 h <= 150,                                                         
   l,

   L   ,     L = a + 2r0                                  L = a + 2r0       

   S   ,  S = l + 2r0                                   S = l + 2r0

   Lx2   hx2  
    2-                     Lx2 = a + 2rcx                              Lx2 = a + 2rcx
 ,

   Sx2    hx2    Sx2 = l + 2rx2                               Sx2 = l + 2rx2    ***
 , 

   h    
( ),
 l <= h                                                     hc = h0                                           hc = h0       

 l > h                                                       hc = h0 - (0.14 + (5*10^ -4)h)(l - h)     hc = h0 - 0.12(l - h)

 rcx (  hx), 
 l <= h                                                     rcx = rx                                           rcx = rx               

 l > h                                                       rcx = r0(hc - hx) / hc                        rcx = r0(hc - hx) / hc

 r1x (  hx),   l > h,     r1x = 0.5(h0 - hx) / (h0 - hc)              r1x = 0.5(h0 - hx) / (h0 - hc)   

________________
***
2rx2 -    rx2