Jun. 25, 2009 (China Knowledge) - The U.S. on Tuesday filed a complaint with the World Trade Organization (WTO) regarding China's restrictions on the export of key industrial raw materials, said U.S. Trade Representative Ron Kirk yesterday, the Standard reported.The E.U. joined the U.S. in the complaint because China refused to cut export tariffs or raise quotas.The U.S. and the E.U. said that Chi
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