tough casing
31shell — I. noun Etymology: Middle English, from Old English sciell; akin to Old English scealu shell, Old Norse skel, Lithuanian skelti to split, Greek skallein to hoe Date: before 12th century 1. a. a hard rigid usually largely calcareous covering or… …
32Cavitation — is defined as the phenomenon of formation of vapour bubbles of a flowing liquid in a region where the pressure of the liquid falls below its vapour pressure. Cavitation is usually divided into two classes of behavior: inertial (or transient)… …
33German cuisine — Typical German breakfast buffet German cuisine is a style of cooking derived from the nation of Germany. It has evolved as a national cuisine through centuries of social and political change with variations from region to region. The southern… …
34Tree of life — For other uses, see Tree of life (disambiguation). An 1847 depiction of the Norse Yggdrasil as described in the Icelandic Prose Edda by Oluf Olufsen Bagge The concept of a tree of life, a many branched tree illustrating the idea that all life on… …
35Steam locomotive — A steam locomotive is a locomotive powered by steam. The term usually refers to its use on railways, but can also refer to a road locomotive such as a traction engine or steamroller.Steam locomotives dominated rail traction from the mid 19th… …
36Grande Armée — La Grande Armée Active 1805–15 Country …
37Shell (projectile) — This article is about the artillery projectile. For the small arms ammunition, see Shotgun shell. Some sectioned shells from the First World War. From left to right: 90 mm fragmentation shell, 120 mm pig iron incendiary shell, 77/14 model 75 mm… …
38Diving regulator — and Octopus Other names Demand valve Uses Reduces pressurized breathing gas to ambient pressure and delivers it to the diver Inventor Manuel Théodore Guillaumet (1838), Benoît Rouquayrol (1860) …
39USS Trathen (DD-530) — was a World War II era Fletcher class destroyer in the service of the United States Navy, named after Lieutenant Commander James Trathen, commander of USS Midnight (1861) during the American Civil War. Trathen was laid down on 17 March 1942 at… …
40Castanopsis — Taxobox name = Castanopsis image width = 200px image caption = Castanopsis sieboldii regnum = Plantae divisio = Magnoliophyta classis = Magnoliopsida subclassis = Rosidae unranked ordo = Eurosids I ordo = Fagales familia = Fagaceae genus =… …
