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Cold weather comfort : heating catalog no. 158. (1909)
Chicago House Wrecking Company · Chicago House Wrecking Company · leaf 19
(EXP TANK -RETURN PIPE /-MERCURY <)heat circulator The RightWay Note the direction in which the pipes should be pitched.Heating · HVAC · Boilers · Radiators · plumbing -- catalogs, Division 22, plumbing fixtures
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