Spanish to English Tech/Engineering Engineering: Industrial Desalination plant

Hi all, continuing the marine works/desalination plant saga (I had no queries at all until 50% way through this document, and now either my brain has turned to mush, or I just happen to have struck a dodgy patch).

context, "Listado I-O, instrumentos, circuitos, partidas de obra, cables, materiales y cubicaciones."

I have "List of I-Os, instruments, circuits, articles of works, cables, material and volumes."

I'm not happy with several things, but here it is really 'volumes' that I question. It is in the Automation section. I wonder whether 'sizings' would not be better. Otherwise, whether I should (assume and) expand to 'volumes of materials' or 'cubic volumes'

... or something else. Also if you think anything else is wrong do feel free to say. I have a fair old learning process going on here!