Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 574
Fig. 7. DIRECT CONNECTED DISC FANWITH MOTOR Fig. 8. THE A. & J. DISC VENTILATING FAN from an exhaust to a blast fan. Our automatic grease cups and adjustable boxes alsoadd to the points of construction which make repairs few and inexpensive. SIZE PRICE 18 inches $ 40 00 24 inches 50 00 30…
Building materials
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