B61L 23/20
Control, warning, or like safety means along the route or between vehicles or vehicle trains for controlling traffic in one direction only automatically operated with transmission of instructions to stations along the route
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Edits on 16 Mar, 2022
Golden AI
Edits on 9 Mar, 2022
Golden AI
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Description (+223 characters)
B61L 23/20
Control, warning, or like safety means along the route or between vehicles or vehicle trains for controlling traffic in one direction only automatically operated with transmission of instructions to stations along the route
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