Investigation of service obtained from trolley wheels shows that mileages obtained vary from 1400 to 17,000 and that cost per 1000 car-mi. varies from 2 cents to 33 cents; desirable characteristics for making trolley-wheel castings; their purchase should be subject to rigid inspection.
Some essentials for trolley wheels
Elec. Ry. Jl
Electric Railway Journal ; 73 , n 16
1929
Article (Journal)
English
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