| http://www.w3.org/ns/prov#value | - ergy Services, Inc., under the trade name ???MICROBLOCK.??? An example of a suitable foaming surfactant is commercially available from Halliburton Energy Services, Inc., under the trade name ???ZONESEAL 3000.??? An example of a suitable defoamer is commercially available from Halliburton Energy Services, Inc., under the trade name ???D-AIR 3000L.???
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