... Ball-connection handrailRijin handrail adopts ball-connection and surface treatment of hot-dipped galvanization zinc. It has the ... , railway, road, bridge, quay, school, water works, sewage treatment plant, garden path, platform, stairs and separating fence, etc. The ... requirements. Type IndicationI. Surface Treatment G: G means hot-dip galvanizing, other surface treatment is not marked.II. Plate ...