Fifty-two men released from operating payroll and car movements speeded up at westbound hump yard at West Detroit, Mich.; comparison of humping costs before and after car retarder operation.
Car retarders save Michigan Central $400 a day
Ry. Signaling
Railway Signaling ; 23 , n 3
1930
4 pages
11 Figs.
Aufsatz (Zeitschrift)
Englisch
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