two-sleeve spiral magnetic structure
1Gramophone 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 …
2Insect wing — Original veins and wing posture of a dragonfly. Hoverflies hovering to mate …
3environmental 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 …
4List of oil field acronyms — Contents 1 # 2 A 3 B 4 C …
5Surgery — This article is about the medical specialty. For other uses, see Surgery (disambiguation). A cardiothoracic surgeon performs a mitral valve replacement at the Fitzsimons Army Medical Center. Surgery (from the Greek …
