<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31471577</termId><termName>master-keyed locks</termName><termType>PT</termType><termNote><![CDATA[ Locking systems intended for use in a series, each lock of which may be actuated by two different keys, one capable of operating every lock of the series, and the other capable of operating only one or a few of the locks. ]]></termNote><termCreatedDate>2026-03-30 21:06:55</termCreatedDate><relation><relationType>UF</relationType><termId>31471578</termId><termName>locks, master-keyed</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31471579</termId><termName>master-keyed lock</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31458108</termId><termName>locks by form</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31478285</termId><termName>duplex locks</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31478288</termId><termName>hotel locks</termName><termType>PT</termType></relation></term>  </Zthes>