BS 5911-1-2002 Concrete pipes and ancillary concrete products. Specification for unreinforced and reBS 5911-1-2002 Concrete pipes and ancillary concrete products. Specification for unreinforced and reinforced concrete pipes
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。