A.5 B.10 C.15 D.20
A.剛性接觸網(wǎng) B.柔性接觸網(wǎng) C.鏈性接觸網(wǎng) D.第三軌
A.車場(chǎng)采用50kg/m B.車場(chǎng)采用90kg/m C.車場(chǎng)采用7#道岔 D.車場(chǎng)采用碎石道床