B61L 23/06
Control, warning, or like safety means along the route or between vehicles or vehicle trains for warning men working on the route
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Edits on 9 Mar, 2022
Golden AI
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Infobox (+4 properties)
Description (+129 characters)
B61L 23/06
Control, warning, or like safety means along the route or between vehicles or vehicle trains for warning men working on the route
Infobox
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