. , . 4- , 4

. D=60 (100/500 .)

. D=60 (100/500 .)
0 .
1 425.67 .
:
1 425.67 .
1 425.67 .
-
+
×
,
. . 1000 .
. D=60 (100/500 .)  
, , !
   .  D=60 (100/500 .)