1. ,

, (, ) , , , 1/4 (), 1/2 (). , , .

, , . , ( ) .

. , , . , . .

, , . . , , , , .

, , . . . , = 1, . , = 0,8-0,9. . = 0,5-0,7.




.1 -



c .1. .1 , . (.1 ) . . , .1 , ( ). (.1 ), , .

. .1 , , . , , Z0 30 300 .

, (.1 , ). . . 50 90 1 15 . .2.




.2 -



, (, ). . .


( 20 )

, 100 300 100 7 / 50 .


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