[国外标准] ASTM B5-00(2005) 高电导率韧炼铜精炼型材标准规范
[国外标准] AWS B5.9-2000 specification for the qualification of welding supervisors
[国外标准] AWS B5.5-2000 specification for the qualification of welding educators
[国外标准] AWS B5.4-2005 specification for the qualification of welder test facilities
[国外标准] AWS B5.2-2001 specification for the qualification of welding inspectors
[国外标准] AWS B5.17-2008 Specification for the Qualification ofWelding Fabricators
[国外标准] AWS B5.17-2004 specification for the qualification of welding engineers
[国外标准] AWS B5.16-2006 Specification for the Qualification of Welding Engineers
[国外标准] AWS B5.16-2001 specification for the qualification of welding engineers
[国外标准] AWS B5.15-2003 specification for the qualification of radiographic interpreters
[国外标准] AWS B5.14-2002 specification for the qualification of welding sales representatives
[国外标准] AWS B5.1 2003 Specification for the Qualification of Welding Inspectors