
Guidelines and qualification schemes Broadband Part 220: Basic principles for line construction specialists fibre optic network technology underground line construction
出版:Verband Deutscher Elektrotechniker

專家解讀視頻
Guidelines and qualification schemes Broadband Part 220: Basic principles for line construction specialists fibre optic network technology underground line construction
出版:Verband Deutscher Elektrotechniker
專家解讀視頻