A.構(gòu)架 B.輪對(duì) C.軸箱 D.車(chē)體
A.靜止逆變器供電 B.同步劈相機(jī)供電 C.變流器 D.異步劈相機(jī)供電
A.15s B.30s C.120s D.60s