<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31354546</termId><termName>retort holders</termName><termType>PT</termType><termNote><![CDATA[ Scientific equipment to which chemical or other laboratory equipment can be fixed when in use, typically consisting of a heavy base supporting a vertical metal rod to which clamps can be attached to hold test tubes or burettes for experiments in titration or for filtering. ]]></termNote><termCreatedDate>2026-03-30 20:35:40</termCreatedDate><relation><relationType>UF</relationType><termId>31354547</termId><termName>retort holder</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31354548</termId><termName>ring stand</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31324647</termId><termName>labware</termName><termType>PT</termType></relation></term>  </Zthes>