| 11. | The trackless trolley system in Providence was dismantled in the mid-1950s.
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| 12. | Trackless trolleys replaced streetcars on December 11, 1948.
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| 13. | From operations started, transport within the mine was performed using trackless machinery.
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| 14. | Consumer electronics, on the other hand, can be a trackless mine field.
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| 15. | The entirety of Route 73 was converted from streetcars to trackless trolleys in 1958.
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| 16. | However, trolleybuses continued using the overhead wires until 1932, with trackless cars.
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| 17. | Bald eagles soared above the trackless wilderness.
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| 18. | Trackless trolleys and streetcars still run here.
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| 19. | Not even the trackless ocean is immune.
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| 20. | Yet it is not exactly trackless _ huge regions are a spiderweb of seismic lines.
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