(1)方向欄 (2)進(jìn)路欄 (3)信號(hào)機(jī)欄 (4)道岔欄 (5)敵對(duì)信號(hào)欄 (6)軌道區(qū)段欄 (7)迎面進(jìn)路欄 (8)進(jìn)路號(hào)碼