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FILE - In this Sept. 24, 2009 file photo, President Barack Obama welcomes China's President Hu Jintao as he arrives for the G-20 summit dinner in Pittsburgh. U.S. companies have long demanded that China let its currency rise to make U.S. exports cheaper. But as President Hu Jintao visits Washington Wednesday, Jan. 19, 2011, U.S. companies are stressing other goals: Stopping the theft of intellectual property. And getting a fair chance to win government contracts. (AP Photo/Charles Dharapak, File)