<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31345789</termId><termName>achromats</termName><termType>PT</termType><termNote><![CDATA[ Lenses that have no chromatic aberrations. ]]></termNote><termCreatedDate>2026-03-30 20:33:16</termCreatedDate><relation><relationType>UF</relationType><termId>31345790</termId><termName>achromat</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31345791</termId><termName>achromatic lense</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31345792</termId><termName>achromatic lenses</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31345793</termId><termName>lenses, achromatic</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31321570</termId><termName>photographic lenses</termName><termType>PT</termType></relation></term>  </Zthes>