1.

      .
     , , , .. , .


. 1
     D. , 120o. (. 1). . 2 , .

. 2b

        . , , ,
        . 3 t1, t2, t3. +1, +2, +3.



. 3

        t = t1 - , -Y C-Z - . -. t = t2 - -Z . . 30o. t = t3 - -Y , C-Z , -Z. 360o.

,

        f1 - ;
             - ;
             n1 - .
        2τ,
          - D.
 
     (1)
         n1 - .
       , . 1, , 2 = 2. 3000 /.
        , D , . , (1), , n1 = 1500 /.
        , .
  1. .
  2. .


, , , , , , , 70% " ", 30% - , . .
- , - . , . - , . . , , - . 100%. , . FAQ .




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