<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31377302</termId><termName>solar-assisted heat pumps</termName><termType>PT</termType><termNote><![CDATA[ Heat pumps whose operation is at times supplemented by solar collector-storage systems. ]]></termNote><termCreatedDate>2026-03-30 20:41:46</termCreatedDate><relation><relationType>UF</relationType><termId>31377303</termId><termName>heat pumps, solar-assisted</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31377304</termId><termName>pumps, solar-assisted heat</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31377305</termId><termName>solar-assisted heat pump</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31347230</termId><termName>heat pumps</termName><termType>PT</termType></relation></term>  </Zthes>