<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31319829</termId><termName>permeability agent</termName><termType>PT</termType><termNote><![CDATA[ An additive used to make hardened concrete more water-resistant. ]]></termNote><termCreatedDate>2026-03-30 20:26:12</termCreatedDate><relation><relationType>UF</relationType><termId>31319830</termId><termName>agent, permeability</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31305843</termId><termName>additive</termName><termType>PT</termType></relation></term>  </Zthes>