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Mechanical equipment of buildings; a reference book for engineers and architects (1916)
Harding, Louis Allen, Willard, Arthur C. (Arthur Cutts), 1878-1960 · New York Wiley · leaf 215
Fig. 21. Section of Vacustat. … Fig. 22. Dunham Air I ine Valve. Fig. 23. DIRECT STEAM HEATING 205 Trane Mercury Seal 5Y5TEMBuilding · Heating · Ventilation
Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.
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