NFPA 51-2007 Standard for the Design and Installation of Oxygen–Fuel Gas Systems for Welding, CuttinNFPA 51-2007 Standard for the Design and Installation of Oxygen–Fuel Gas Systems for Welding, Cutting, and Allied Processes
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。