DB61 T 989-2015 地质公园建设规范.pdf

相关资源

DB41 T 819-2013 地质公园地质遗迹保护规范.pdf

DB41 T 2150-2021 地质公园数字化建设规范.pdf

猜你喜欢

ITU-R BS 411-4-1990 Fading Allowances in HF Broadcasting《高频(HF)广播的衰减允许》.pdf

ITU-R BS 412-9 FRENCH-1998 Planning Standards for Terrestrial FM Sound Broadcasting at VHF《甚高频(VHF)地面调频声音广播的规划标准》.pdf

ITU-R BS 412-9 SPANISH-1998 Planning Standards for Terrestrial FM Sound Broadcasting at VHF《甚高频(VHF)地面调频声音广播的规划标准》.pdf

ITU-R BS 412-9-1998 Planning Standards for Terrestrial FM Sound Broadcasting at VHF《VHF地面调频声音广播的规划标准》.pdf

ITU-R BS 415-2 FRENCH-1986 MINIMUM PERFORMANCE SPECIFICATIONS FOR LOW-COST SOUND-BROADCASTING RECEIVERS《低成本声音广播接收机的最低性能规范》.pdf

ITU-R BS 415-2 SPANISH-1986 MINIMUM PERFORMANCE SPECIFICATIONS FOR LOW-COST SOUND-BROADCASTING RECEIVERS《低成本声音广播接收机的最低性能规范》.pdf

ITU-R BS 415-2-1986 Minimum Performance Specifications for Low-Cost Sound-Broadcasting Receivers《低成本声音广播接收机的最低性能规范 第10A-2节 热带区域的声音广播》.pdf

ITU-R BS 450-3 FRENCH-2001 Transmission standards for FM sound broadcasting at VHF《甚高频(VHF)的调频声音广播的传输标准》.pdf

ITU-R BS 450-3 SPANISH-2001 Transmission standards for FM sound broadcasting at VHF《甚高频(VHF)的调频声音广播的传输标准》.pdf