<http://webisa.webdatacommons.org/298596183>	<http://www.w3.org/ns/prov#value>	"A piezo-electric crystal, in the form of a thin disc, is cemented to a thin metal diaphragm made of such material as beryllium-copper." .
<http://webisa.webdatacommons.org/298596183>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.ca> .
<http://webisa.webdatacommons.org/298596183>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/330892521>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/298596183> .