<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31305894</termId><termName>filter</termName><termType>PT</termType><termNote><![CDATA[ Any porous material, such as paper or sand, through which a gas or liquid is passed to separate out matter in suspension. ]]></termNote><termCreatedDate>2026-03-30 20:22:18</termCreatedDate><relation><relationType>BT</relationType><termId>31298939</termId><termName>materials by function</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31320034</termId><termName>molecular sieves</termName><termType>PT</termType></relation></term>  </Zthes>