Kõrgendike materjalisuhe, mida tavaliselt tähistatakse kui Smrk1 ja lihtsalt Pmrk1 või Rmrk1 2D-profiilis, tähistab pinna kareduse kohal olevate materjali tippude poolt kaetud pindala protsentides ning see on funktsionaalne parameeter, mida kasutatakse pinna esialgse kulumise või kandevõime iseloomustamiseks.
The material ratio of hills, commonly denoted as Smrk1 (or simply Pmrk1 or Rmrk1 in 2D profile), represents the percentage of the surface area covered by the peak material tips, above the core roughness, and it is a functional parameter used to characterize the initial wear or load-bearing area of a surface before it is broken in.
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