资料来源 : pyDict

转辙员,扳道员,有能力的组织者

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Shunter \Shunt"er\, n. (Railroad)
   A person employed to shunt cars from one track to another.

资料来源 : WordNet®

shunter
     n : a small locomotive used to move cars around but not to make
         trips