A.650m B.750m C.850m D.950m
A.50t B.60t C.30t D.40t
A.補(bǔ)機(jī)長(zhǎng)度 B.2臺(tái)機(jī)車長(zhǎng)度 C.3臺(tái)機(jī)車長(zhǎng)度 D.機(jī)車長(zhǎng)度