中海壳牌南海石化项目因工程建设的需要，在厂区范围内建立了四个永久性水准点作为场地高程控制网。
The four permanent benchmarks are built as the altitude control network in the place because of the requirement for the CSPC Nanhai petrochemical project's building.
中海壳牌南海石化项目因工程建设的需要，在厂区范围内建立了四个永久性水准点作为场地高程控制网。
The four permanent benchmarks are built as the altitude control network in the place because of the requirement for the CSPC Nanhai petrochemical project's building.
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