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<http://webisa.webdatacommons.org/168839693>	<http://www.w3.org/ns/prov#value>	"introduce the high voltage to cathode 108. Threaded rods 120 extend through insulating bushings 122 made from a suitable material such as a ceramic." .
<http://webisa.webdatacommons.org/prov/44773412>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/168839693> .