<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31322761</termId><termName>surface layers</termName><termType>PT</termType><termNote><![CDATA[ Those materials that form an outermost coating. ]]></termNote><termCreatedDate>2026-03-30 20:27:01</termCreatedDate><relation><relationType>UF</relationType><termId>31322762</termId><termName>layers, surface</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31322763</termId><termName>surface layer</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31307037</termId><termName>layers</termName><termType>PT</termType></relation></term>  </Zthes>