<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31478285</termId><termName>duplex locks</termName><termType>PT</termType><termNote><![CDATA[ Cylinder-type locks with independent pin tumblers, both controlling the same bolt, and operated with dual keys, one a master key designed to control a set of such locks. ]]></termNote><termCreatedDate>2026-03-30 21:08:48</termCreatedDate><relation><relationType>UF</relationType><termId>31478286</termId><termName>duplex lock</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31478287</termId><termName>locks, duplex</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31471577</termId><termName>master-keyed locks</termName><termType>PT</termType></relation></term>  </Zthes>