Free from bent and twisted rails, frog, switches, and guard rails, or rails with split rail.

不含任何弯曲或扭曲轨、道岔、转辙器及制动轨，或有裂口或破底钢轨。

youdao

Free from bent and twisted rails, frog, switches, and guard rails, or rails with split rail.

不含任何弯曲或扭曲轨、道岔、转辙器及制动轨，或有裂口或破底钢轨。

youdao