CN patent 2613509Y, Huang Weiquan, "Automatic marking device for convex traffic line", published 2004-04-28, assigned to Sanhuan Yakeli Traffic Material
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Lyon, Craig; Persaud, Bhagwant; Eccles, Kimberly (June 2015). Safety Evaluation of Centerline Plus Shoulder Rumble Strips. McLean, VA: U.S. Department of Transportation, Federal Highway Administration, Office of Safety Research and Development. Retrieved 1 November 2015.