ETSI EN 301 462-1999 标准详情
- 标准号:ETSI EN 301 462-1999
- 中文标题:人为因素( HF ) ,符号识别电信设施听人V1,1,1的尊敬和硬
- 英文标题:Human Factors (HF); Symbols to Identify Telecommunications Facilities for the Dear and Hard of Hearing People V1.1.1
- 标准类别:欧洲通信ETS,I-ETS,PRI-ETSETS
- 发布日期:1999