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<http://webisa.webdatacommons.org/196175359>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/196175359>	<http://www.w3.org/ns/prov#value>	"There are special restrictions regarding the coating material, if the material is an insulator having a low reactivity with the heating element and a thermal expansion coefficient difference of 5.0???10???6/K or less from that of aluminum nitride." .
<http://webisa.webdatacommons.org/prov/185367160>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/196175359> .