<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31346567</termId><termName>steam heating</termName><termType>PT</termType><termNote><![CDATA[ Heating systems utilizing steam circulated through radiators and pipes. ]]></termNote><termCreatedDate>2026-03-30 20:33:29</termCreatedDate><relation><relationType>UF</relationType><termId>31346568</termId><termName>heating systems, steam</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31346569</termId><termName>heating, steam</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31346570</termId><termName>steam heating systems</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31346571</termId><termName>systems, steam heating</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31321800</termId><termName>heating systems</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31377089</termId><termName>vacuum heating</termName><termType>PT</termType></relation></term>  </Zthes>