Specialists examine a mechanical arm of the Jiaolong, China's manned submersible, aboard the Xiangyanghong 09 scientific research vessel, June 30, 2012. The Jiaolong has successfully completed its program of deep-sea dives, with a sixth and final dive to 7,000 meters in the Mariana Trench in the Pacific Ocean on Saturday. It will now enter a trial period of application after having come through its program of trial dives to depths ranging from 1,000 to 7,000 meters in the deepest part of the world's oceans. (Xinhua/Zhou Wenjie)
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