In brief this paper provides the new theory basis and the method for the research well wellhead device operating performance and the development high performance.

总之本文为研究采油井口装置工作性能，开发高性能的采油井口装置提供了新的理论依据和方法。

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However, those who study the development of high performance have demonstrated repeatedly that practice and executing effective effort play a huge role in the skills we develop.

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The researchers said it provided invaluable data for the development of high-performance, high-altitude parachute systems, and that the lessons learned would inform the development of new ideas for emergency evacuation from vehicles, such as spacecraft, passing through the stratosphere.

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The researchers on the Red Bull Stratos project say it has already provided invaluable data for the development of high-performance, high-altitude parachute systems, and that the lessons learned will inform the development of new ideas for emergency evacuation from vehicles, such as spacecraft, passing through the stratosphere.

BBC: Skydiver Felix Baumgartner breaks sound barrier