怎么翻译 Midstream、Downstream?

大田

Manufacturer of acid and alkali resistant flooring coatings for midstream oil & gas, power generation, downstream oil & gas and other industrial plants. Other services available include storage tank repair, secondary containment, pipe repair and reinforcement, composite wrap repairs, concrete crack injection and restoration, abrasive blasting services and sponge jet blasting.

请问下：上面的 midstream、downstream, secondary containment，怎么翻译好？