<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31478689</termId><termName>spiral vaults</termName><termType>PT</termType><termNote><![CDATA[ Annular vaults with a spiral axis used to support, for example, the steps of a spiral stair. ]]></termNote><termCreatedDate>2026-03-30 21:08:54</termCreatedDate><relation><relationType>UF</relationType><termId>31478690</termId><termName>helical vaults</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31478691</termId><termName>spiral vault</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31478692</termId><termName>vaults, helical</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31478693</termId><termName>vaults, spiral</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31472589</termId><termName>barrel vaults</termName><termType>PT</termType></relation></term>  </Zthes>