, [I].
400000 . 35%, 35% , 30% [2, ].
70% [4-6]. - [7]. - [8].
.
- Reilly L.M. et al. (1983) [9] Gray-Weale A.C. et al. (1988) [10], , - - . . , , . , -, . , , . , . 2000 2004 .. 645 . 503 . Gore-Tex 352 . 256 4 3 . 96 - . Sonoline Omnia (Siemens, ) Logiq 700 (GE , ) , 5,0 7,5 . . , . . . 48 2 .
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