share: digg facebook twitter GENEVA (AP) — The World Trade Organization ruled Tuesday that China was unfairly protecting its domestic manufacturers by limiting the export of nine raw materials that are used widely in steel, aluminum and chemical industries. A WTO panel sided with the United States, European Union and Mexico, which had each filed complaints saying China was driving up the prices they pay for raw materials such as coke, bauxite and zinc by setting export duties and quotas on them. China's export restrictions have caused supplies of some raw materials to tighten globally, pushing prices higher and favoring an emphasis on using Chinese manufacturing facilities.