<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31395851</termId><termName>heat shields</termName><termType>PT</termType><termNote><![CDATA[ Barriers of ablative material to protect a spacecraft from heat on its entry into an atmosphere. ]]></termNote><termCreatedDate>2026-03-30 20:35:56</termCreatedDate><relation><relationType>UF</relationType><termId>31395852</termId><termName>heat shield</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31325103</termId><termName>aircraft and spacecraft components</termName><termType>PT</termType></relation></term>  </Zthes>