tube mill machines, namely, machines for manufacturing lightweight thin-wall tubing for use in radiators and heat transfer applications, and tooling for such tube mill machines; burst testers, namely, tube testing machines for testing welded seams in radiator and heat transfer tubing to detect bursting points; core assembly machines, namely, machines for automatically stacking thin-wall tubing and fins for radiator and condenser cores; trayers, namely, machines for automatically placing thin-...