SUB IN A TUB
A worker climbs up from Zhang Wuyi’s newly designed unmanned submarine, built to harvest sea cucumbers, during a test operation at an artificial pool near a shipyard in Wuhan, Hubei Province, China, on Tuesday. Zhang, a 38-year-old farmer who is interested in scientific inventions, has independently made eight miniature submarines with several fellow engineers, one of which was sold to a businessman in Dalian for 100,000 yuan (US$15,855) in 2011. The submarines, designed mainly for harvesting aquatic products, have a diving depth of 20m to 30m and can travel for 10 hours, local media reported.Mar 28, 2013
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