[国家标准] GB/T 6312-2022 壁厚千分尺
[国外标准] BS 6312-2.2-1997 Connectors for analogue telecommunication interfaces. Sockets for use with plugs sp
[国外标准] BS 6312-2.1-1994 Connectors for analogue telecommunication interfaces. Sockets for use with plugs sp
[国外标准] BS 6312-1-1994 Connectors for analogue telecommunication interfaces. Specification for plugs
[国家标准] GB/T 6312-2004 壁厚千分尺
[国家标准] GB 6312-1986 壁厚千分尺