A domestic submersible has reached a depth of 3,759 meters, making China the fifth country in the world to acquire deep-diving technology surpassing the 3,500-meter mark, authorities said on Thursday. The Chinese submersible Jiaolong, which is 8.2 meters long and weighs nearly 22 tons, was designed to reach a depth of 7,000 meters and operate in most of the world's oceans, officials said.
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