... Working speed:2.5-3 m/m 2012 New Designed Concrete Groove Machine:This product is an indispensable tool for building ... concrete pavement, widely used in building cement pavement, venues, airports, bridges, docks.It is suitable for the mud road, roads ... method which uses plastic brush, broom, napping machine.After grooved by this machine,the road surface is slip-proof, durable, smooth surface ...