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method for berippung of waermeaustauscherflaechen with wellbaendern, device for carrying out the process and tube and plattenfoermige elements of waermeaustauschern with wellbandrippen
method for berippung of waermeaustauscherflaechen with wellbaendern, device for carrying out the process and tube and plattenfoermige elements of waermeaustauschern with wellbandrippen