|
: |
|
http://nian2002.blog.163.com/blog/static/137573557201082114310512/
- "Power Cables" (" ") ., , :
http://www.arhibook.ru/29150-power-cables-the-ultimate-guide-to-knitting.html
" ":
1 - -
2 - " ". -
...
30 - "" . +
31 - . - + 2
32 -
: |
|
:
L=2r =D,
:
L - ( )
= 3, 14
r- (.. 2r = D)
D-
:
D=L/
52 :
D = 52/3,14 = 16,5
0,5-1
: |