... clear and smooth figure, silvery appearance, modern-styled. 2.Optimal drainage: Leaking area can reach 83.3%, which is as twice ... road, public squares, gardens, wharf, airport, parking, highway, railway, industrial engineering and so on.Type of bearing barW--welded steel ... shapes, sizes, spans, load capability in different conditions.1. Drainage cover with embedded parts: 2. U-type: As to ditches ...