... , rust in the acid (hydrochloric acid or sulfuric acid) of a certain ingredient, exposing a clean metal surface, and then ... towers, light poles, microwave towers, shipbuilding, iron pieces, a variety of profiles, seamless pipe, highway guardrail, traffic signs iron pieces, the ... company covers an area ofarea of 30,000 square meters and a building area of 1,800 square meters, unique scale ...