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BiWee smart phone controlled fighting robots are shown during an unveiled press preview event for the 2014 International Consumer Electronics Show (CES) at the Mandalay Bay Convention Center in Las Vegas, Nevada, USA, 06 January 2014. The company touts the unit as the world's first curved flexible smart phone featuring a six-inch (15 cm) curved P-OLED screen. CES, the world's largest annual consumer technology trade show runs from 07 to 10 January 2014 and is expected to feature 3,200 exhibitors showing off their latest products and services to about 150,000 attendees. (Photo by Michael Nelson/EPA)
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