
PREN 50289-1-9 COMMUNICATION CABLES - SPECIFICATIONS FOR TEST METHODS - PART 1-9: ATTENUATION UNBALANCE
出版:British Standards Institution

专家解读视频
PREN 50289-1-9 COMMUNICATION CABLES - SPECIFICATIONS FOR TEST METHODS - PART 1-9: ATTENUATION UNBALANCE
出版:British Standards Institution
专家解读视频