<http://webisa.webdatacommons.org/20191222>	<http://www.w3.org/ns/prov#value>	"In one embodiment, the inclined surfaces and the contact surfaces are made of a hardened material and/or a thermally insulating material, such as tungsten carbide." .
<http://webisa.webdatacommons.org/prov/47681406>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/20191222> .
<http://webisa.webdatacommons.org/20191222>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/20191222>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.es> .