GOST R 51671-2020 Technical aids for communication and information of public use for disabled persons. Classification. Requirements of accessibility and safety
1970GOST R 51671-2020 Technical aids for communication and information of public use for disabled persons. Classification. Requirements of accessibility and safety
2015GOST R 51671-2015 Technical aids for communication and information of public use for disabled persons. Classification. Requirements of accessibility and safety
2000GOST R 51671-2000 Technical aids for communication and information of public use for disabled persons. Classification. Requirements of accessibility and safety