39. .
1) , .
2)(= 120...150 /) (H = 24...40 /)
3) 400 760
4) 100 /2 .
()
, , , ≤ 0,15...0,2 /.
1)J = k f E
2) k = 3 ∙ 10 - 3 /( ∙ )
3) 30 100 0,4 /
4) - 100 3
J = π R γ f B,
, , = μH, f , ; γ , /; R , .
() 12.1.045-84, 2.2.4.1191-03
= 60 /
= 25 /.
= 8 /
300 2400 100 /2.
40. . .
( 60% );
- ( 60%);
- ( 40%);
( 10%).
. , , - , 90%- 1,5 2,5
1)- 2.2.2/2.4-1396-03, 5 2 25 /, 250 , = 0,2 /.
500 . 15 /.