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Duct construction;: A handbook on the fabrication and installation of heating, ventilating, and air conditioning ducts, round pipes, stacks, fittings, heater, coil, and washer housings;
O. W Kothe
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Duct construction;: A handbook on the fabrication and installation of heating, ventilating and air conditioning ducts, round pipes, stacks, fittings, ... and taking off quantities of materials, etc
O. W Kothe
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