GB/T 5440-1985.Stereophonic broadcast magnetic recorder.GB/T 5440适用于带宽为6. 3 mm广播...

国家标准2023.07.27

GB/T 7401-1987.Method of subjective assessment of quality of colour TV pictures....

国家标准2023.07.27

GB/T 9003-1988.Mothods of measurement for the fund amental characteristics of mi...

国家标准2023.07.27

GB/T 8617.1-1988.Technical parameters and measur ing methods for FM broadcasting...

国家标准2023.07.27

GB/T 8617. 2一1988.Technical parameters and measuring methods for FM broadcasting...

国家标准2023.07.27

GB/T 8617.3-1988.Technical parameters and measur ing methods for FM broadcasting...

国家标准2023.07.27

GB/T 4645-2006.Screen luminance for the projection of motion-picture prints in i...

国家标准2023.07.27

GB 12281 一1990.Requir ements for the interconnections and matching of color tele...

国家标准2023.07.27

GB/T 12047-1989.Multiprogramme still picture broadcasting system.1主题内容与适用范围GB/T...

国家标准2023.07.27

GB/T 12365-1990.Technical par ameters for short distance optical cable tr ansmis...

国家标准2023.07.27