tubular drill
21flute — flutelike, adj. /flooht/, n., v., fluted, fluting. n. 1. a musical wind instrument consisting of a tube with a series of fingerholes or keys, in which the wind is directed against a sharp edge, either directly, as in the modern transverse flute,… …
22military technology — Introduction range of weapons, equipment, structures, and vehicles used specifically for the purpose of fighting. It includes the knowledge required to construct such technology, to employ it in combat, and to repair and replenish it.… …
23Blowout preventer — A blowout preventer (BOP) is a large valve that encases an oil well at surface. During drilling or well interventions, the valve may be closed if overpressure from an oil reservoir causes formation fluids such as oil and natural gas to back up… …
24Completion (oil and gas wells) — This article is about the oil or gas well completion. For other uses of completion, see Completion (disambiguation) In petroleum production, completion is the process of making a well ready for production (or injection). This principally involves …
25Opening — (Roget s Thesaurus) < N PARAG:Opening >N GRP: N 1 Sgm: N 1 hole hole foramen Sgm: N 1 puncture puncture perforation Sgm: N 1 fontanel fontanel Sgm: N 1 transforation transforation Sgm: N 1 pinhole pinhole …
26Old World monkey — Old World monkeys[1] Temporal range: Oligocene–Recent …
27Seismic retrofit — Seismic retrofitting is the modification of existing structures to make them more resistant to seismic activity, ground motion, or soil failure due to earthquakes. Other retrofit techniques are applicable to areas subject to tropical cyclones,… …
28Mesh — For other uses, see Mesh (disambiguation). This tea strainer is made of metal mesh Mesh consists of semi permeable barrier made of connected strands of metal, fiber, or other flexible/ductile material. Mesh is similar to web or net in that it has …
29Martin Anderson controversy — Martin Lee Anderson (c. January 15, 1991 ndash; January 6, 2006) was a 14 year old from Florida who died while incarcerated at a boot camp style youth detention center, the Bay County Boot Camp, [http://media.tbo.com/tbo/1128lee3.pdf] Mark A.… …
30environment — environmental, adj. environmentally, adv. /en vuy reuhn meuhnt, vuy euhrn /, n. 1. the aggregate of surrounding things, conditions, or influences; surroundings; milieu. 2. Ecol. the air, water, minerals, organisms, and all other external factors… …
