Second, America has a long history of drilling for oil and gas, which has spawned a huge and competitive oil-services industry bristling with equipment and know-how.

其次，美国钻探石油和天然气的历史悠久，进而衍生出一个庞大的具有竞争力的石油服务行业，专业设备完善，专业技术成熟。

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Its customer base comprises four of North America's largest providers of pressure-pumping services to the drilling industry: Baker Hughes Inc.

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