<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31410483</termId><termName>arc welding</termName><termType>PT</termType><termNote><![CDATA[ The joining of metal parts by fusion in which the necessary heat is produced by means of an electric arc, that is, the electrical discharge between two electrodes. ]]></termNote><termCreatedDate>2026-03-30 20:50:22</termCreatedDate><relation><relationType>UF</relationType><termId>31410484</termId><termName>arc-welded</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31410485</termId><termName>electric arc welding</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31410486</termId><termName>electrical arc welding</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31410487</termId><termName>welding, arc</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31410488</termId><termName>welding, electric arc</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31372342</termId><termName>electric welding</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31436587</termId><termName>projection welding</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31436589</termId><termName>shielded metal arc welding</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31436597</termId><termName>stud welding</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31402855</termId><termName>electric arcs</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31421735</termId><termName>arc welding machines</termName><termType>PT</termType></relation></term>  </Zthes>