In 845 BC Marquis Wen Huang Meng (aka Huang Zhang ) moved the capital of the from Yicheng to Huangchuan (present-day Huangchuan, Henan). Huang Xi's descendants ruled State of Huang until 648 BC when it was destroyed by the State of Chu. The Marquis of Huang, Marquis Mu Huang Qisheng , fled to the state of Qi. The people of Huang were forced to relocate to Chu. They settled in the region of present-day Hubei province. [pdf]
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This article lists the main components of a onshore . rigs have similar elements, but are configured with a number of different drilling systems to suit drilling in the marine environment. The equipment associated with a rig is to some extent dependent on the type of rig but typically includes at least some of the items listed below. [pdf]
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