Dia 1 Stiinta si Tehnica 3-1986 pag 45
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Dia 2 Stiinta si Tehnica 3-1986 pag 45
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Dia 3 Stiinta si Tehnica 3-1986 pag 45
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Dia 4 Stiinta si Tehnica 3-1986 pag 45
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