wood casing
21Oil well — The pumpjack, such as this one located south of Midland, Texas, is a common sight in West Texas. An oil well is a general term for any boring through the earth s surface that is designed to find and acquire petroleum oil hydrocarbons. Usually… …
22List of accidents and incidents involving military aircraft, 1950-1974 — This is a list of notable accidents and incidents involving military aircraft grouped by the year in which the accident or incident occurred. For more exhaustive lists, see the [http://www.baaa acro.com/ Aircraft Crash Record Office] or the [http …
23Nail (fastener) — A pile of nails. In woodworking and construction, a nail is a pin shaped, sharp object of hard metal or alloy used as a fastener. Formerly wrought iron, today s nails are typically made of steel, often dipped or coated to prevent corrosion in… …
24Cult of Skaro — Doctor Who character The Cult emerge from the Void Ship in Army of Ghosts Cult of Skaro Species Daleks …
25Completion (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 …
26Drilling fluid — This article is about fluids used when drilling a well. For fluids used with drill bits during metal working, see cutting fluid. Driller pouring a foaming agent down the rod string on a drilling rig In geotechnical engineering, drilling fluid is… …
27Dalek — This article is about the fictional species. For the 1963 serial, see The Daleks. For the 2005 episode, see Dalek (Doctor Who episode). For other uses, see Dalek (disambiguation). Doctor Who alien …
28Shaped charge — Sectioned high explosive anti tank round with the inner shaped charge visible …
29India Mark II — A broken India Mark II pump in rural Uganda A busy Mark II pump in Uganda. Children often bear th …
30Naphtha launch — An Escher Wyss launch of 1888 Alfred Nobel s aluminium hulled …
