Tandem Roller. Monday , June 04th , 2018 - 15:07:59 PM
A road roller (sometimes called a roller-compactor or just roller) is a compactor type engineering vehicle used to compact soil gravel concrete or asphalt in the construction of roads and foundations. Similar rollers are used also at landfills or in agriculture.
In some parts of the world road rollers are still known colloquially as steam rollers regardless of their method of propulsion. This typically only applies to the largest examples
An intermediate gear which does not drive a shaft to perform any work is called an idler gear. Sometimes a single idler gear is used to reverse the direction in which case it may be referred to as a reverse idler. For instance the typical automobile manual transmission engages reverse gear by means of inserting a reverse idler between two gears.
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