So off to Mr Google's wonderful translator. The first was something rather plain - Gorlovka Steel Works which worked out to: "Горловка Ϻеталлургический Завод". That seems simple enough. But making a sign that just says that would be.... boring. So back to Google to find something suitably officious. With that attempt, I came up with this.
Завод Детского Питания - Baby Food Plant
Государственный Индустриальный Завод - State Industrial Plant