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Subject Item
isa:303732193
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prov:value
The invention relates generally to methods for secondary recovery of crude oil from oil strata formations, the invention particularly relating to a method and apparatus for indirectly heating recovered crude oil by means of solar energy and injecting the heated crude oil back into the oil formation in order to reduce the viscosity of oil remaining in the formation, thereby to facilitate recovery o
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isa:303732193
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isa:303732193