<?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">sandwich panels</topic></authority><related type="narrower"><topic>structural insulated panels</topic></related><related type="narrower"><topic>aluminum composite panels</topic></related><related type="broader"><topic>building materials</topic></related><variant type="other"><topic>panels, sandwich</topic></variant><variant type="other"><topic>sandwich panel</topic></variant> <note xml:lang="en"><![CDATA[ Building panels consisting of two high-density outer sheets, usually plywood, hardwood, or metal, bonded to a lightweight core material, often plastic foam, rubber, or honeycombed paper. ]]></note></mads>