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Gravity Warm-air Heating

University of Illinois (Urbana-Champaign campus). Engineering Experiment StationIllinois. University. Engineering experiment stationNational Warm-Air Heating and Air Conditioning Association (U.S.)

其他書名	Digest of Research, Engineering Experiment Station, University of Illinois
出版	National Warm-air Heating and Air Conditioning Association, 1935
URL	http://books.google.com.hk/books?id=gsfVAAAAMAAJ&hl=&source=gbs_api