switchman

n.

转辙员；

复数：switchmen

Switchman's flag
THE RAILROAD SWITCHMAN
Switchman's Union of North America Charter
Switchman's High Blood Alcohol Level Justified Suspension
Study on Application of Screw Switchman
Tracks: The Art and Times of Switchman Joe
Paul Tomkowicz: Street Railway Switchman
Blame the Switchman? Russian Railways Restructuring after Ten Years
A couple of old favorites inspired Lionel's switchman with flag
MEK, a switchman for cell type-specific regulation of connective tissue growth factor in primary liver cells