| http://www.w3.org/ns/prov#value | - A system for extracting crude oil sludge from the bottom of a cargo tank, the system comprising: at least one auger pump having an open top to collect and pump sludge; at least one injector through which crude oil or other liquid is pumped to loosen sludge collected at the bottom of the cargo tank; at least one conduit or pipe downstream from said pump for collecting and transporting sludge; a com
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