<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31349301</termId><termName>valves</termName><termType>PT</termType><termNote><![CDATA[ Devices applied to aerophones, primarily to brass instruments, to alter their tube length by a fixed amount during play. ]]></termNote><termCreatedDate>2026-03-30 20:34:15</termCreatedDate><relation><relationType>UF</relationType><termId>31349302</termId><termName>valve</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31323157</termId><termName>aerophone components</termName><termType>PT</termType></relation></term>  </Zthes>