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2. Road roller - Wikipedia

   en.wikipedia.org/wiki/Road_roller

   Caterpillar soil compactor equipped with padfoot drum, being used to compact the ground before placing concrete Antique "Kemna" steamroller. A road roller (sometimes called a roller-compactor, or just roller [1]) is a compactor-type engineering vehicle used to compact soil, gravel, concrete, or asphalt in the construction of roads and foundations. [1]

3. Steamroller - Wikipedia

   en.wikipedia.org/wiki/Steamroller

   1925 Robey tandem roller #42693, now owned by the Robey Trust [9]. The majority of rollers were of the same basic 3-roll configuration, gear-driven, with two large smooth wheels (rolls) at the back and a single wide roll at the front (in actuality, the wide roll usually consisted of two narrower rolls on the same axle, to make steering easier).

4. Continuous track - Wikipedia

   en.wikipedia.org/wiki/Continuous_track

   The chassis was supported on "numerous small wheels or rollers" which ran upon the lower iron bands, which "thus form a perfectly portable and smooth road for the platform". The drums were 275 or 305 cm (9 or 10 ft) in diameter, 790 cm (26 ft) apart.

5. Traction engine - Wikipedia

   en.wikipedia.org/wiki/Traction_engine

   They were typically designed with a single heavy roller (in practice, usually a pair of adjacent rollers) replacing the front wheels and axle, and smooth rear wheels without strakes. Some traction engines were designed to be convertible : the same basic machine could be fitted with either standard treaded road wheels, or else smooth rolls ...

6. Roller (agricultural tool) - Wikipedia

   en.wikipedia.org/wiki/Roller_(agricultural_tool)

   The roller is an agricultural tool used for flattening land or breaking up large clumps of soil, especially after ploughing or disc harrowing. Typically, rollers are pulled by tractors or, prior to mechanisation, a team of animals such as horses or oxen. As well as for agricultural purposes, rollers are used on cricket pitches and residential ...

7. Dynapac - Wikipedia

   en.wikipedia.org/wiki/Dynapac

   The site in Karlskrona opened in 1960, which made heavy rollers and had the company's technical centre. The CA 25 road roller introduced in 1970 became the world's leading compaction roller. It changed its name to Dynapac Maskin AB in 1973; at this moment the company rapidly expanded its product range.