Practical at bulldozers

 which is the prototype of the first roller, appeared in 1860 in France steamroller, to further promote and improve the construction technology and quality gravel road, and speed up the pace. In the early 1900s, the world recognized the gravel road was the most excellent road and promotion in the world, the concept of compacted gradually been known, Rollers also will appear on each road construction site, the mid-19th century,hydraulic track bulldozer the internal combustion engine invention to the development of compaction equipment brought great vitality. The first internal combustion engine driven roller born in the early 20th century. Then there is the tire roller, sheep foot roller compactor wheel with light almost simultaneously produce,  Hydraulic Drive Crawler Bulldozers people still compactor compaction were studied, that weight gain can make the roller compactor line pressure increases, thereby increasing the pressure real effect.