| http://www.w3.org/ns/prov#value | - atter (52, 52 a, 52 d), thereby again substantially filling said device and substantially removing atmospheric air from said device and particularly from contact with said usable material (50, 50 c, 50 d), the sum of said remaining volume of usable material (50, 50 c, 50 d) plus said subsequent volume of displacment matter (52, 52 a, 52 d) substantially equaling said total initial material volume;
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