<?xml version="1.0" encoding="utf-8"?><metadata xmlns:dc="http://purl.org/dc/elements/1.1/"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dcterms="http://purl.org/dc/terms/"><dc:title xml:lang="en">electron tubes</dc:title><dc:identifier>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31321908</dc:identifier><dc:language>en</dc:language><dc:publisher xml:lang="en">Getty Institute</dc:publisher><dcterms:created>2026-03-30 20:26:47</dcterms:created><dcterms:isPartOf xsi:type="dcterms:URI">http://AATesaurus.cultura.gencat.cat/aat/getty_en</dcterms:isPartOf><dcterms:isPartOf xml:lang="en">Tesaurus d&apos;Art i Arquitectura</dcterms:isPartOf><dc:format>text/html</dc:format> <dcterms:alternative xml:lang="en">audion</dcterms:alternative> <dcterms:alternative xml:lang="en">audions</dcterms:alternative> <dcterms:alternative xml:lang="en">electron tube</dcterms:alternative> <dcterms:alternative xml:lang="en">electronic valve</dcterms:alternative> <dcterms:alternative xml:lang="en">electronic valves</dcterms:alternative> <dcterms:alternative xml:lang="en">thermionic valves</dcterms:alternative> <dcterms:alternative xml:lang="en">valve</dcterms:alternative> <dcterms:alternative xml:lang="en">valve, thermionic</dcterms:alternative> <dcterms:alternative xml:lang="en">valves</dcterms:alternative> <dc:description xml:lang="en"><![CDATA[ Refers to devices used to amplify or otherwise modify electrical current via the flow of electrons in an evacuated glass tube or bulb. ]]></dc:description></metadata>