A worker holds a partially assembled electronic cigarette during testing at the Ruyan factory in Tianjin, China, Thursday, Feb. 19th, 2009. The battery powered products, which resemble real cigarettes but produce a fine nicotine mist absorbed quickly and directly by the lungs, are gaining ground in America and Europe, and have even made a dent in China, home to 350 million smokers - the worlds biggest tobacco market.
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