The chief counsel Fred Bartlit made his comments at the opening of a final two-day hearing into the accident.

首席顾问Fred Bartlit在为期两天的听证会的开始发表了评论。

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The letter from Fred Bartlit Jr. to the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling said that tests in February on a cement slurry similar to what was used on the Macondo well showed instability -- and that both companies had the data.

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