1. : , . , . 120. ;
, . , , . " ". . , .
2. . , 120 (.3.5) . 120.
, : ; ; .
. 3.6. , , .
. 3.6, to , .
, , () . , to (. 3.7, ). .
. 3.7
. 3.7, ti, = 60. , . . , , . . . = 60. , . ( , ). t2 t3 (. 3.6, ). , , . , (. 3.7, ) ( ( )). 2 = 2 n1=60f1=60∙50=3000 / (f1=50 ). ,
; m ; , .
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. . , B , , ( ), . . (. . 3.8).
. , 120, . , , , . 3.9, 180.
to, , . , 2 = 4 = 2 n1 = 60f1 / p = 3000/2 =1500 /. , , .3.10. = 3 , , n1 = 1000 /.
, /,
n1 = 60 f1 / p (3.1)
. = 1, 2 3 f 1 = 50 3000, 1500 1000 /.
. , , , . , .3.11, . 3.11, 6. , = 1, n1 = 3000 /. , 1500 /. 50
1 = 60 f1 / p = 60 ∙50 / p.
= 1, 2, 3, 4, 5, 6, 8, 10, . . 3.1.
3. , . , , . " ". . , .
4. - , .
5. , .. , , .. .
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6.
7. , .