Four big firms dominate the business of managing geological data, digging Wells, building RIGS, handling infrastructure and developing the technology needed for large projects.
四大公司占据着行业的统治地位，它们控制着地质数据、挖井数目、建筑器械，操纵着基础设施，改进着大型项目需要的技术。
Four big firms dominate the business of managing geological data, digging Wells, building RIGS, handling infrastructure and developing the technology needed for large projects.
四大公司占据着行业的统治地位，它们控制着地质数据、挖井数目、建筑器械，操纵着基础设施，改进着大型项目需要的技术。
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