额定参数停炉以及事故停炉后,如检修需要启引风机对炉膛强迫冷却以缩短工期时,应待空预器前烟温下降到()以下,方可进行,但应根据汽包壁温差,不使温差超限
查看答案
Two Cisco routers are connected to each other and are enabled CDP. Serial line is up,protocol is also up but cdp neighbor not working. What layer of the OSI model does the problem most likely exist?