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Waterproof casing for offshore drilling

2007-12-19View Original

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This post was last edited by No. 18 at 2009-5-4 15:05: There are new and old types of male and female heads for risers used in offshore drilling. What is the difference between the new and old types? Please give me some advice from my friends at CNOOC. Please elaborate or explain some obvious differences, preferably with pictures, thank you.

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