Driver intimidating person friendly tire destructive trafficway controller
作者： Harry D. Dickinson
DOI:
关键词:
摘要: A vehicle trafficway controller characterized by a person friendly driver intimidating wrong-way traffic condition for causing tire tread damage, having vertically extensible piercing member shiftably carried frame and with retractile point, movable protective cover isolating said point when in condition, exposing to rolling thereover, the being frangible and/or extended retracted.
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