| http://www.w3.org/ns/prov#value | - The cement of this invention exhibits no efflorescence, good board life, workability, and acceptable color for use with such construction materials as brick, cinder block, and concrete block....http://www.google.es/patents/US4268316?utm_source=gb-gplus-sharePatente US4268316 - Portland cement, kiln dust, fly ash B???squeda avanzada de patentes N???mero de publicaci???nUS4268316 ATipo de publicaci?
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