aluminum dust
11Pyrope — A gem quality, emerald cut pyrope. General Category Nesosilicate Chemical formula …
12environmental works — ▪ civil engineering Introduction infrastructure that provides cities and towns with water supply, waste disposal, and pollution control services. They include extensive networks of reservoirs, pipelines, treatment systems, pumping stations …
13Gramophone record — A 12 inch (30 cm) 33⅓ rpm record (left), a 7 inch 45 rpm record (right), and a CD (above) A gramophone record, commonly known as a phonograph record (in American English), vinyl record (in reference to vinyl, the material most commonly used after …
14zinc processing — Introduction preparation of the ore for use in various products. Zinc (Zn) is a metallic element of hexagonal close packed (hcp) crystal structure and a density of 7.13 grams per cubic centimetre. It has only moderate hardness and can …
15printmaking — /print may king/, n. the art or technique of making prints, esp. as practiced in engraving, etching, drypoint, woodcut or serigraphy. [1925 30; PRINT + MAKING] * * * Art form consisting of the production of images, usually on paper but… …
16Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
17Abrasive blasting — Sandblasting a stone wall Diesel powered compressor used as an air supply for sandblasting …
18Lunar Roving Vehicle — This article is about the Apollo rovers. For the Soviet robotic rovers, see Lunokhod program. For the planned Chinese robotic rover, see Chang e 3. The Lunar Roving Vehicle (LRV) or lunar rover was a battery powered four wheeled rover used on the …
19explosive — explosively, adv. explosiveness, n. /ik sploh siv/, adj. 1. tending or serving to explode: an explosive temper; Nitroglycerin is an explosive substance. 2. pertaining to or of the nature of an explosion: explosive violence. 3. likely to lead to… …
20Bahrain — /bah rayn , ruyn , beuh /, n. 1. a sheikdom in the Persian Gulf, consisting of a group of islands: formerly a British protectorate; declared independent 1971. 603,318; 232 sq. mi. (601 sq. km). Cap.: Manama. 2. the largest island in this group:… …
