abrasion
n.
磨损
(1)Aprocessinwhichhardparticlesorprotuberancesareforcedagainstandmovedalongasolid
surface.
(2)Arougheningorscratchingofasurfaceduetoabrasivewear.
(3)Theprocessof
grindingorwearingawayasurfacethroughtheuseofabrasives.