<http://webisa.webdatacommons.org/165721913>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<freepatentsonline.com> .
<http://webisa.webdatacommons.org/165721913>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/44773409>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/165721913> .
<http://webisa.webdatacommons.org/165721913>	<http://www.w3.org/ns/prov#value>	"With these criteria in mind, the mold is normally constructed of aluminum or its alloys, although other materials such as ceramics or special polymers may be used." .