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23 31 00 HVAC Ducts and Casings

23 31 00 HVAC Ducts and Casings

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23 31 00 HVAC Ducts and Casings
SHEET METAL CONNECTORS INC

05 58 10 Sheet Metal Fabrications 23 00 00 Heating, Ventilating and Air Conditioning (HVAC) 23 30 00 HVAC Air Distribution 23 31 00 HVAC Ducts and Casings 23 33 00 Air Duct Accessories 23 37 00 Air Outlets and Inlets
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