chiziqli chеksiz elastik jismlarda to’lqin tarqalishi
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1449938018_62537.doc ( ) t , a a r = ( ) 2 2 0 0 t u f u u graddiv ¶ ¶ = + + + r r r r r r d m m l y f r r rot grad f + = ( ) t , x , x , x 3 2 1 f f = ( ) 3 3 2 2 1 1 3 2 1 e e e t , x , x , x r r r r r × + × + × = = y y y y y ( ) t , x , x , x 3 2 1 i i y y = y j r r …
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