<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31457186</termId><termName>duralumin</termName><termType>PT</termType><termNote><![CDATA[ An alloy consisting of 95.5 parts of aluminum to 3 parts of copper, 1 of manganese, and 0.5 of magnesium that after age-hardening is comparable in strength and hardness to soft steel. ]]></termNote><termCreatedDate>2026-03-30 21:03:03</termCreatedDate><relation><relationType>UF</relationType><termId>31457187</termId><termName>dural</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31438435</termId><termName>aluminum alloy</termName><termType>PT</termType></relation></term>  </Zthes>