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</html><thumbnail_url>https://www.surfnetkids.com/go/wp-content/uploads/2008/03/MetricStainlessSteelRuler-e1403649384859.jpg</thumbnail_url><thumbnail_width>550</thumbnail_width><thumbnail_height>362</thumbnail_height><description>The metric system is a system of measurement. Different countries have different systems of measurements. The metric system as it will be described for you here is in reference to the system of measurement used by the United States. There [&hellip;]</description></oembed>
