In what year did Ferdinand Carré receive the U.S. patent for his development of a closed ammonia-absorption system? a 1850
b 1860
c 1870
d 1880
Publication date: 03/19/2001
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This overview of the benefits of zoning includes tips for selling to consumers and businesses. Tom Jackson discusses options for new construction and retrofit, as well as some ways a residential contractor can get into the light commercial business with zoning products. Speaker: Tom Jackson, CEO, Jackson Systems|
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