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1 result for “page 2 of 7” · 2653ms

Patent

US4237963 Process and apparatus for control of the climatic environment of an underground enclosure including a source of extraneous heat

Cited prior art · Edmond Girard · Messier SA · United States · 1980

at the tempera ing a supplementary array of pipes arranged under the Page 7 floor of said enclosure and connected to the first array a utilization circuit associated