What is the purpose of this pipeline at the gas station?
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What is the function of the pipeline marked at this gas station? It seems to be the inlet and outlet pipelines of the oil pump. Why not simply have the oil flow in from the tank to the pump and then out through separate pipelines? It’s all such a complicated setup...
If you have to go around it, it’s better to follow the actual process on site. It seems I don’t understand these two colored line segments. It is necessary to compare it with the actual installation on site. It is also advisable to consult with the design firm to confirm such a diagram. For reference.