Italian to English Tech/Engineering Metallurgy / Casting Finishing aluminium

Aluminium plates and fixtures are finished by "sandblasting" as follows:-

"Consiste nella sabbiatura delle superfici, in speciali cabine a depressione, mediante getto continuo di miscela aria-abrasivo al corindone."

I'm assuming these are depressurised booths or something like that. Can anyone confirm or give another term?