casing wall
21Drilling 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… …
22Sacco and Vanzetti — This article is about the individuals Nicola Sacco and Bartolomeo Vanzetti. For 1971 film, see Sacco e Vanzetti. For 2004 docu drama, see The Diary of Sacco and Vanzetti. For 2006 documentary film, see Sacco and Vanzetti (film). Bartolomeo… …
23Ronald Ryan — Infobox Criminal subject name = image size = image caption = date of birth = birth date|1925|2|21|df=y place of birth = Carlton, Victoria, Australia date of death = death date and age|1967|2|3|1925|2|21|df=y place of death = HM Prison Pentridge,… …
24Khafre's Pyramid — Infobox Egyptian pyramid Name=Khafre s Pyramid Owner=Khafre Type=True Pyramid Height=convert|136.4|m|ft|0 [ [http://skyscraperpage.com/cities/?buildingID=1007 SkyscraperPage Pyramid of Chefren] ] (Originally: convert|143.5|m|ft|0|disp=/|abbr=on)… …
25tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening …
26Deepwater Horizon explosion — This article is about the explosion. For the drilling rig and oil spill, see Deepwater Horizon (disambiguation). Deepwater Horizon explosion Anchor handling tugs and platform supply vessels combat the fir …
27Deepwater Horizon oil spill — 2010 oil spill and BP oil spill redirect here. For other oil spills in 2010, see 2010 oil spill (disambiguation). For the 2006 oil spill involving BP, see Prudhoe Bay oil spill. For the drilling rig and explosion, see Deepwater Horizon… …
28Thermal power station — Republika Power Plant, a thermal power station in Pernik, Bulgaria …
29rotary engine — 1. an engine, as a turbine, in which the impelling fluid produces torque directly rather than by acting upon reciprocating parts. 2. a revolving radial engine. [1810 20] * * * Internal combustion engine in which the combustion chambers and… …
30Teller–Ulam design — The basics of the Teller–Ulam design. Radiation from a primary fission bomb compresses a secondary section containing both fission and fusion fuel. The compressed secondary is heated from within by a second fission explosion. The Teller–Ulam… …
