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Colored Aggregates for Road Surfaces That Require Warning and Anti Slip Measures, Such as Sharp Slopes at Highway Turns, Tunnel Entrances, etc, Find Details and Price about Colored Anti-Skid Aggregates High Friction Resistance from Colored Aggregates for Road Surfaces That Require Warning and Anti Slip Measures, Such as Sharp Slopes at Highway Turns, Tunnel Entrances, etc - SHANDONG YINJI NEW MATERIAL SCIENCE AND TECHNOLOGY DEVELOPMENT COMPANY LIMITED