Yumen Oilfield Machinery Plant received notification from China Petroleum Technology Develo.......
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On March 16, 2012, nearly 200 U.S. congressional delegations is.......
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Low-speed wire cutting is the use of continuous moving thin .......
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The theme of the 2012 International Consumer Day is "consumption and security.......
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This is a general view of the participants at the symposium .......
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The performance of the fan is closely related to the drying .......
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