<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31438471</termId><termName>Invar (TM)</termName><termType>PT</termType><termNote><![CDATA[ A low-expansion iron alloy containing about 36% nickel; used for precision surveying instruments and timepieces. ]]></termNote><termCreatedDate>2026-03-30 20:58:11</termCreatedDate><relation><relationType>BT</relationType><termId>31412130</termId><termName>iron alloy</termName><termType>PT</termType></relation></term>  </Zthes>