circular casing
41Topfmine — The Topfmines were a series of German circular minimum metal anti tank blast mines that entered service with the German army in 1944, during the Second World War.The mines used a case made of compressed wood pulp, cardboard and tar along with… …
42M39 Pantserwagen — Type Armoured car Place of origin  Netherlands …
43Life Sciences — ▪ 2009 Introduction Zoology In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …
44tunneling shield — ▪ engineering machine for driving tunnels in soft ground, especially under rivers or in water bearing strata. The problem of tunneling under a river had defied the engineering imagination for centuries because of the difficulty of preventing mud …
45Façade — • The face or front of any building. In ecclesiastical architecture the term is generally used to designate the west front; sometimes the transept fronts Catholic Encyclopedia. Kevin Knight. 2006. Facade Façade …
46Nooka — Type Privately held Industry Luxury goods Founded 2004 Founder(s) …
47Floppy disk — Floppy redirects here. For other uses, see Floppy (disambiguation). 8 inch, 5 1⁄4 inch, and 3 1⁄2 inch floppy disks …
48Space Shuttle — STS redirects here. For other uses, see STS (disambiguation). This article is about the NASA Space Transportation System vehicle. For the associated NASA STS program, see Space Shuttle program. For other shuttles and aerospace vehicles, see… …
49Valve — This article is about the flow control device. For the game developer, see Valve Corporation. For the electronic component, see Vacuum tube. For other uses, see Valve (disambiguation). These water valves are operated by handles. A valve is a… …
50Parachute — This article is about the device. For sports involving a parachute, see Parachuting. For other meanings, see Parachute (disambiguation). Parachutes opening A parachute is a device used to slow the motion of an object through an atmosphere by… …
