<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31349984</termId><termName>ballasts</termName><termType>PT</termType><termNote><![CDATA[ Devices used with an electric discharge lamp to obtain and maintain the necessary circuit conditions, such as voltage, current, and wave form, for starting and operating. ]]></termNote><termCreatedDate>2026-03-30 20:34:27</termCreatedDate><relation><relationType>UF</relationType><termId>31349985</termId><termName>ballast</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31349986</termId><termName>ballast resistors</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31349987</termId><termName>resistors, ballast</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31323391</termId><termName>lighting device components</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31379743</termId><termName>reference ballasts</termName><termType>PT</termType></relation></term>  </Zthes>