A.0.5B.1C.2D.3
A.源端唯一B.多源融合C.主配一體D.符合規(guī)范
A.廣播報(bào)文對(duì)時(shí)B.脈沖對(duì)時(shí)C.IRIG-B 碼對(duì)時(shí)D.NTP 對(duì)時(shí)