A.機(jī)車信號(hào)變?yōu)樵试S信號(hào) B.低速接點(diǎn)或壓力接點(diǎn)切除 C.非定時(shí)切除
A.156km/h B.10km/h C.5km/h
A.16 B.32 C.24