BS 2779-1986 Specification for Pipe threads for tubes and fittings where pressure-tight joints are nBS 2779-1986 Specification for Pipe threads for tubes and fittings where pressure-tight joints are not made on the threads
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。