BS EN 124-6-2015 机动车辆和/或行人区域的水沟顶部和人孔顶部. 聚丙烯 (PP), 聚乙烯 (PE)或者未增塑聚氯乙烯 (PVC-U) 制水沟顶部和人孔顶部
Gully tops and manhole tops for vehicular and pedestrian areas. Gully tops and manhole tops made of polypropylene (PP), polyethylene (PE) or unplasticized poly(vinyl chloride) (PVC-U)