| http://www.w3.org/ns/prov#value | - As of December 31, 2013, we have not experienced any significant shortages of raw materials and normally do not carry inventories of such raw materials in excess of those reasonably required to meet our production and shipping schedules.Commodity cost volatility, most notably related to copper, aluminum, petroleum-based resin products and fuel, is a challenge for us and our industry.
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