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Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	A hard wall cleanroom may very well require electrical, water, propane or other systems to be installed below grade, which, of course, adds to hard wall cleanroom construction costs.
http://www.w3.org/ns/prov#wasQuotedFrom	cleanzones.com