If I want to say that a holding company owns and operates a number of oil-processing plants, all interlinked in the business sense but spread across different locations, what words/phrases could I use? In Russian, we use the word complex, like complex of oil-processing plants, but in English complex seem to imply the presence of its elements at a single location or their physical connection (complex of roads), but not their connection in the sense of product streams.
Am I right that "complex of plants" or even "complex of enterprises" (as one Russian dictionary suggests) will sound and look strange to a native speaker?
I looked for synonyms and found "system, network". Are these O.K. and what other words/phrases could be used to the same effect?
"According to the plan, the Holding's network/system of oil processing plants will process some 8 mn tonnes of crude next year."