Friday, September 16, 2022
Saturday, September 17, 2022
问题:在利用SOSC电监控通道时,需要配合OTU单板传递电监控信息,若...
Friday, September 16, 2022
Friday, September 16, 2022
Thursday, September 15, 2022
问题:光缆传输设计时,在一个中继段内,光缆富余度不应超过()DB。...
Friday, September 16, 2022
Wednesday, September 14, 2022
问题:敷设架空光缆时,架空线路的拉线应符合规定,当线路偏转角大于()时...
Saturday, September 17, 2022
Saturday, September 17, 2022
Friday, September 16, 2022
Friday, September 16, 2022
问题:与市内街道、里弄胡同、铁道、公路、土路平行和交越时安全距离分别为...
Sunday, September 11, 2022
Thursday, September 15, 2022
Friday, September 16, 2022
问题:一般情况下,7/2.6拉线采用夹板法制作时,缠扎铁线用()镀锌铁...
Sunday, September 11, 2022
问题:以下哪种()网络具有自愈能力。A、链型B、星型C、环型D、树型...
Sunday, September 3, 2023
Friday, September 16, 2022
Saturday, September 17, 2022
Friday, September 16, 2022
Saturday, September 17, 2022