abrasion mark
51Plastic — is the general common term for a wide range of synthetic or semisynthetic organic solid materials suitable for the manufacture of industrial products. Plastics are typically polymers of high molecular weight, and may contain other substances to… …
52Corrosion — v · d · e Materials failure modes Buckling · …
53Pneumothorax — Classification and external resources Right sided spontaneous pneumothorax (left in the image). An arrow indicating the edge of the collapsed lung. ICD 10 J …
54Stone carving — is an ancient activity where pieces of rough natural stone are shaped by the controlled removal of stone. Owing to the permanence of the material, evidence can be found that even the earliest societies indulged in some form of stone work.Work… …
55Dinosaur Park Formation — Stratigraphic range: Late Cretaceous, 76.5–75 Ma …
56steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying …
57Mohs hardness — Rough measure of the resistance of a smooth surface to scratching or abrasion, expressed in terms of a scale devised by German mineralogist Friedrich Mohs in 1812. Minerals are ranked in comparison with the Mohs scale, which is made up of 10… …
58cobalt processing — Introduction preparation of the metal for use in various products. Below 417° C (783° F), cobalt (Co) has a stable hexagonal close packed crystal structure. At higher temperatures up to the melting point of 1,495° C (2,723° F), the… …
59Protection of exposed concrete — is necessary to prolong its service life. A 120 year design life for concrete infrastructure has become increasingly common. Without early preventive maintenance this design life target may be optimistic. The design service life of reinforced… …
60Tooth (human) — For other uses of tooth or teeth , see Tooth (disambiguation). Teeth An adult human s teeth …
