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5.

, . , :

(5.1)

rot.

:

(5.5) ,

(5.3) (5.4), ,

(5.4) (5.5)

(5.7), (5.8), (5.9) (5.2),

(5.10) . ,

, , (5.10)

(5.11), (5.12) .

, .

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