<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31432116</termId><termName>carbon arcs</termName><termType>PT</termType><termNote><![CDATA[ Electric arcs produced between two electrodes, at least one of which is made of carbon. ]]></termNote><termCreatedDate>2026-03-30 20:56:34</termCreatedDate><relation><relationType>UF</relationType><termId>31432117</termId><termName>carbon-arc</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31432118</termId><termName>arcs, carbon</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31432119</termId><termName>carbon arc</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31402855</termId><termName>electric arcs</termName><termType>PT</termType></relation></term>  </Zthes>