| http://www.w3.org/ns/prov#value | - The reason why this measure is of particular interest to our industry is that it applies not just to stand-alone materials (such as 4- by 8-foot panels), but also to components used in other products, including doors and windows.There are exceptions, specifically windows for HUD-approved manufactured homes, windows containing less than five percent by volume of composites and exterior doors contai
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