... Co.,Ltd has approved ISO9001-2000 Quality Management System and we work ISO9001-2008 that is the newest edition now. There ... trench cover, sump cover,compound gratings, storage shelves, ladder, fences and handrail so on for construction project, oil project, seaport, power ... plant, water plant, defense project, chemical factory and so on.We produce three kinds of steel gratings, they ...