<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31352626</termId><termName>sound amplifiers</termName><termType>PT</termType><termNote><![CDATA[ Devices that increase the physical vibrations of sound, whether by mechanical or electronic means. ]]></termNote><termCreatedDate>2026-03-30 20:35:09</termCreatedDate><relation><relationType>UF</relationType><termId>31352627</termId><termName>amplifiers, sound</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31352628</termId><termName>sound amplifier</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31324473</termId><termName>amplifiers</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31384640</termId><termName>audio power amplifiers</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31384646</termId><termName>funnel horns</termName><termType>PT</termType></relation></term>  </Zthes>