BS 4514-1983 Specification for Unplasticized PVC Soil and Ventilating Pipes, Fittings and AccessorieBS 4514-1983 Specification for Unplasticized PVC Soil and Ventilating Pipes, Fittings and Accessories
部份国外标准涉及版权问题,所以全部国外标准于2013年02月,全部删除!相关页面仅提供参考消息。