Road Roller,Shandong Hongda Laiyang City,Shandong Province.strong ... frequency. The YZ20, YZ18 and YZC12 types of road rollers are all-hydraulic vibratory rollers independently designed and ... with different characters and different thicknesses, for example, in road, railway, airport, harbor and water conservancy construction sites. ... equipment can guarantee the drivers personal safety. Road Roller