Methods employed by Chicago Surface Lines in protecting points having greatest wear with copper armor.
Reducing trolley breaks
Traction Shop Roadway
Traction Shop and Roadway ; 3 , n 1
1930
3 Figs.
Article (Journal)
English
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Engineering Index Backfile | 1928
Low records made in trolley wire breaks
Engineering Index Backfile | 1930
Trolley wire breaks prevented by alert maintenance
Engineering Index Backfile | 1929
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European Patent Office | 2020
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