<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31421384</termId><termName>gas masks</termName><termType>PT</termType><termNote><![CDATA[ Masks worn over the face to protect against inhalation of poisonous fumes. ]]></termNote><termCreatedDate>2026-03-30 20:53:34</termCreatedDate><relation><relationType>UF</relationType><termId>31421385</termId><termName>gas mask</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31421386</termId><termName>masks, gas</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31386643</termId><termName>respirators</termName><termType>PT</termType></relation></term>  </Zthes>