词汇	ballastless railway
释义	ballastless railway 无砟轨道
随便看	constant value control system constant value line constant values of basic data Constant van Langhendonck constant vapor concentration constant vapour concentration constant variable constant-/variable-amplitude fatigue constant variable dot method constant variance constant variation constant vector constant-velocity scan constant velocity servomotor constant velocity stacks constant-velocity star constant velocity Constant-Velocity constant velocity cam constant velocity cardan joint constant-velocity cardan joint constant velocity centripetal contraction constant velocity control Constant-velocity control constant velocity drive