... so on for construction project, oil project, seaport, power plant, water plant, defense project, chemical factory and so on.We produce ... ,25, 30, 30.16, 32.5, 34, 40, 41.25, 45, 50, 60, 60.32, 80, 100 mm etc, also be ... -88)C) UK: BS4592-1987D) Australia: AS1657-1985E) Japan: JJS. water drainage metal slot drain cover