| http://www.w3.org/ns/prov#value | - One of the more specific aspects of the invention is directed to the art of sealing, plugging and/or consolidating earth such as rock, sand, soil or other type of earth formation, sometimes for the specific purpose of preventing or at least reducing the flow of liquid therethrough and to render them substantially impervious or at least less pervious to the ow of uid therethrough.
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