<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31358505</termId><termName>hygrometers</termName><termType>PT</termType><termNote><![CDATA[ Instruments that measure the amount of water vapor in the air and thus indicate relative humidity. ]]></termNote><termCreatedDate>2026-03-30 20:36:41</termCreatedDate><relation><relationType>UF</relationType><termId>31358506</termId><termName>hygrometer</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31358258</termId><termName>quantity measuring devices for substances</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31325914</termId><termName>meteorological measuring devices</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31398524</termId><termName>hygrographs</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31398526</termId><termName>psychrometers</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31317187</termId><termName>hygrometry</termName><termType>PT</termType></relation></term>  </Zthes>