Since their adoption on all cars and trolley buses of system, overhead maintenance costs have been lowered substantially; fewer wire breaks and replacements, less noise and reduction of service interruptions among benefits obtained; development of trolley shoe; advantages of sliding collector.
Trolley shoes prove advantageous in Detroit
Elec. Ry. Jl
Electric Railway Journal ; 75 , n 2
1931
3 pages
2 Figs.
Article (Journal)
English
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