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Good day!I ( want to ) participate in the development of boilers and heat sources !Invented a heat exchanger surface, 2 times less metal !I am looking to implement development cooperation Boiler and heat generators !Help in the development of boilers and heat generators of different designs .Have the experience and achievements , work in metal !Patent of Russia and Belarus !Semilet Vladimir (??????? ???????? ??????????)*******@*****.com: +*******07813 skype: ?semilet56 ========================http://semilet56.ucoz.ru/