The rover’s robotic arm carries several other instruments that will be helpful in revealing what secrets the rocks might hold. When scientists find a particularly interesting item, they can reach out and use the arm’s abrader to grind and flatten its surface, revealing its underlying structure and composition.
Source: tatoeba (10815275)
1856, H. A. Dewar, Actuating Mechanism for Rotating Tools, Patent dated 1 March, 1856, in The Practical Mechanic’s Journal, Volume I, p. 232,
[…] provision is made for the attachment thereto of various operating tools, such, for example, as drills, saws, grindstones, polishers, and cutters, or abraders or shapers of various kinds.
Source: wiktionary
In the fabric section, a textile twisting and tearing machine and a "Lissajou curve" [sic] abrader (covering a complete area in overlapping curves) are supplemented by apparatus for evaluating waterproofness, fibre diameter and light-fastness.
Source: wiktionary
2012, G. Domokos and G. W. Gibbons, “The evolution of pebble size and shape in space and time,” arXiv:1109.5707 [physics.geo-ph], p. 2,
The physical assumption underlying Firey’s model is that the abraded particle (pebble) undergoes a series of small collisions with a very large, smooth abrader, and this might be the case when pebbles are carried by a fast river and collied repeatedly with the riverbed […]
Source: wiktionary
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