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; figuring areas and taking off quantities of materials, etc.By O. W. Kothe.
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; figuring areas and taking off quantities of materials, etc.By O. W. Kothe.
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