| http://www.w3.org/ns/prov#value | - Large mild coal gasification systems may range up to 8,000 square feet and may use 5,000 to 10,000 standard cubic feet of oxygen deficient gas per hour per square foot of cross section for thermal treatment of coal and or oil shale whether the coal and or oil shale is to be dried or fractioned into solid and gaseous phase components.
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