<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31347233</termId><termName>heat exchangers</termName><termType>PT</termType><termNote><![CDATA[ Devices that transfer heat between two physically separated fluids; generally consists of a cylindrical shell with longitudinal tubes; one fluid flows inside, the other outside. ]]></termNote><termCreatedDate>2026-03-30 20:33:41</termCreatedDate><relation><relationType>UF</relationType><termId>31347234</termId><termName>exchangers, heat</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31347235</termId><termName>heat exchanger</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31322115</termId><termName>cooling, heating and humidifying components</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31346560</termId><termName>radiant heating</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31377313</termId><termName>coils</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31377315</termId><termName>condensers</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31377317</termId><termName>borehole heat exchangers</termName><termType>PT</termType></relation></term>  </Zthes>