<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31386539</termId><termName>furnace cleaners</termName><termType>PT</termType><termNote><![CDATA[ Devices used to clean ducts or other parts of furnaces used for heating. ]]></termNote><termCreatedDate>2026-03-30 20:53:33</termCreatedDate><relation><relationType>UF</relationType><termId>31483202</termId><termName>cleaner, furnace</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31386540</termId><termName>furnace cleaner</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31386549</termId><termName>heating equipment accessories</termName><termType>PT</termType></relation></term>  </Zthes>