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6.3.3.

(. 6.2) . , (. . 6.3) (. 6.22). , .

, . . (. 6.21) (. 6.22), , . 6.23. 320 520 .

(. 6.24, ). .

. 6.22. 0; () () ,

(. ( ) 4,6 3% .

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