there are other abrasive materials whose
61Devonian Period — Interval of geologic time from 417 to 354 million years ago; it was the fourth period of the Paleozoic Era. During the Devonian, a giant continent was situated in the Southern Hemisphere (see Gondwana), and other landmasses were located in the… …
62Tuberculosis — Classification and external resources Chest X ray of a person with advanced tuberculosis ICD 10 A …
63Tooth (animal) — Teeth in animals vary greatly. Some animals, such as turtles and tortoises, are toothless. Other animals, such as sharks, may go through many teeth in their lifetime. The multiple replacement of teeth is known as polyphedont. Since the appearance …
64Katana construction — was the labour intensive bladesmithing process developed in Japan for forging katana and other Japanese blades. Katana and wakizashi were often forged with different profiles, different blade thicknesses, and varying amounts of grind. Wakizashi… …
65List of TaleSpin characters — This is a list of characters from the animated series TaleSpin, along with the actors who provided the voices where known. Contents 1 Higher for Hire 1.1 Baloo 1.2 Kit Cloudkicker 1.3 …
66Dentine hypersensitivity — is sensation felt when the nerves inside the dentin of the teeth are exposed to the environment. The sensation can range from irritation all the way to intense, shooting pain. This sensitivity can be caused by several factors, including wear,… …
67Pete (Disney) — Pete First appearance Alice Solves the Puzzle (1925) Created by Walt Disney Ub Iwerks …
68Collet — For other uses, see Collet (disambiguation). Collets A collet (  / …
69Volcanic ash — consists of small tephra, which are bits of pulverized rock and glass created by volcanic eruptions,United States Geological Survey. [http://volcanoes.usgs.gov/Hazards/What/Tephra/tephra.html Tephra: Volcanic Rock and Glass Fragments.] Retrieved… …
70Mammal tooth — Contents 1 Mammals 1.1 Rabbit 1.2 Rodent 1.3 Horse 1.4 Humans …
