<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31320486</termId><termName>argon</termName><termType>PT</termType><termNote><![CDATA[ Inert noble gas with symbol Ar and atomic number of 18, used in metalworking and as a filler for electric incandescent and fluorescent light bulbs. ]]></termNote><termCreatedDate>2026-03-30 20:26:23</termCreatedDate><relation><relationType>UF</relationType><termId>31320487</termId><termName>Ar</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31306143</termId><termName>inorganic material</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31319740</termId><termName>elements</termName><termType>PT</termType></relation></term>  </Zthes>