<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31442835</termId><termName>railroad tunnels</termName><termType>PT</termType><termNote><![CDATA[ Tunnels excavated to allow the passage of trains underground, usually through a hill or mountain. ]]></termNote><termCreatedDate>2026-03-30 20:59:19</termCreatedDate><relation><relationType>UF</relationType><termId>31442836</termId><termName>railroad tunnel</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31442837</termId><termName>railway tunnels</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31442838</termId><termName>tunnel, railroad</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31442839</termId><termName>tunnels, railroad</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31417322</termId><termName>tunnels</termName><termType>PT</termType></relation></term>  </Zthes>