<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31353439</termId><termName>oxygen masks</termName><termType>PT</termType><termNote><![CDATA[ Masks fitting over the nose and mouth through which oxygen or oxygen-enriched air is supplied. ]]></termNote><termCreatedDate>2026-03-30 20:35:23</termCreatedDate><relation><relationType>UF</relationType><termId>31353440</termId><termName>masks, oxygen</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31353441</termId><termName>oxygen mask</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31324535</termId><termName>medical equipment</termName><termType>PT</termType></relation></term>  </Zthes>