introduction types tools and uses properties components stone define materials report parts of window types and uses roof roof covering plastic purposes uses introduction of sandstone introduction of sand tupes and uses of sand glass non- ferrous ferrous metals alloys mud and introduction and uses clay classifications concrete prservatives forms wood timber cement compositions brick etc. rocks sandstone marble coal android rock building lintel structure load footing beam foundation column features flooring covering wall finishes treatment design varnish inroduction stairs history typer paints interiordesign interior design windows basic principles basics types of windows
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