Fig. 292.—Double Width Keith Wheel. Fig. 20i>—Inlet Side of Singlk Width Keith Fan KEITH FAN. /ENTn.ATlNG ;ystems. MpZc^tt t ^^^i^^^i ^ ^^° -V^ ^^^ ^^ complete and the wheel separate. This fan is a product ofMessrs. Keith & Blackman Co.. ot London, England, and was onlv brought to its…
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