English to Russian Tech/Engineering industrial processes

Выдержка из текста:
"Air Compressor package PA-7016 includes, one steam turbine driven air compressor, one electric motor driven air compressor, one air receiver drum and a set of two heatless desiccant air dryers.
............
Air receiver drum(s) located outside of battery limits for each individual unit is sized for one-hour operation requirements of the unit."

В интернете нашел выражения "inside the battery limits" (ISBL) и "outside the battery limits" (OSBL). Хотелось бы выяснить, что это означает и как выглядит на русском.

Thanks!