<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">mechanical ventilation</topic></authority><related type="broader"><topic>ventilation</topic></related><variant type="other"><topic>exhaust systems, mechanical ventilating</topic></variant><variant type="other"><topic>mechanical ventilating exhaust systems</topic></variant><variant type="other"><topic>mechanical ventilating systems</topic></variant><variant type="other"><topic>mechanical ventilation supply systems</topic></variant><variant type="other"><topic>mechanical ventilation systems</topic></variant><variant type="other"><topic>supply systems, mechanical ventilation</topic></variant><variant type="other"><topic>systems, mechanical ventilating</topic></variant><variant type="other"><topic>systems, mechanical ventilating exhaust</topic></variant><variant type="other"><topic>systems, mechanical ventilation</topic></variant><variant type="other"><topic>systems, mechanical ventilation supply</topic></variant><variant type="other"><topic>ventilating exhaust systems, mechanical</topic></variant><variant type="other"><topic>ventilating systems, mechanical</topic></variant><variant type="other"><topic>ventilation supply systems, mechanical</topic></variant><variant type="other"><topic>ventilation systems, mechanical</topic></variant><variant type="other"><topic>ventilation, mechanical</topic></variant> <note xml:lang="en"><![CDATA[ Systems supplying and exhausting fresh air by mechanical means. ]]></note></mads>