| http://www.w3.org/ns/prov#value | - a AktiengesellschaftFat, oil and grease flotation treatment of poultry and food industry waste water utilizing hydrogen peroxideUS4929341 *28 Apr 198629 May 1990Source Technology Earth Oils, Inc.Process and system for recovering oil from oil bearing soil such as shale and tar sands and oil produced by such processUS4946597 *24 Mar 19897 Aug 1990Esso Resources Canada LimitedLow temperature bitumen
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