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Two Asian male industrial engineers use a laptop or notebook to work on a plan, inspect work in an engineering factory. utilities Sewers and central wastewater treatment plants
High voltage post,High voltage tower sky sunset background.
Power transmission lines and self-supporting tower through woods in warm evening light against a blue sky
Electric substation in Asuncion, Paraguay at night.
Laying of underground storm sewer pipes at the construction site. Installation of water main and sanitary sewer on background tower cranes and blue sky. Ground water drainage system pipes

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