<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31411905</termId><termName>Mack&apos;s cement</termName><termType>PT</termType><termNote><![CDATA[ Hard, quick-setting cement made of dehydrated gypsum to which is added a small percentage of calcined sodium sulfate and potassium sulfate; used for walls, and for floors, when mixed with sand. ]]></termNote><termCreatedDate>2026-03-30 20:50:45</termCreatedDate><relation><relationType>UF</relationType><termId>31411906</termId><termName>cement, Mack&apos;s</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31374702</termId><termName>gypsum cement</termName><termType>PT</termType></relation></term>  </Zthes>