Патент на электронный высотомер ВПЛ-75 учредителя ООО Научфанпром Валягина Андрея Дмитриевича.
Патент на электронный высотомер ВПЛ-75 учредителя ООО “Научфанпром“ Валягина Андрея Дмитриевича.
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