hollow+shape

  • 41Ancient Chinese coinage — Ancient Chinese coins Chinese coins were produced continuously for around 2,500 years by casting in moulds, rather than being struck with dies as with most western coins. Contents 1 …

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  • 42Blow molding — The blow molding process Blow molding (also known as blow moulding or blow forming) is a manufacturing process by which hollow plastic parts are formed. In general, there are three main types of blow molding: extrusion blow molding, injection… …

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  • 43Chinese coins — Ancient Chinese coins were produced continuously for around 2,500 years by casting in moulds, rather than being struck with dies as with most western coins.Collectors can obtain affordable yet old, beautiful, and interesting coins associated with …

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  • 44bridge — bridge1 bridgeable, adj. bridgeless, adj. bridgelike, adj. /brij/, n., v., bridged, bridging, adj. n. 1. a structure spanning and providing passage over a river, chasm, road, or the like. 2. a connecting, transitional, or intermediate route or… …

    Universalium

  • 45industrial glass — Introduction       solid material that is normally lustrous and transparent in appearance and that shows great durability under exposure to the natural elements. These three properties lustre, transparency, and durability make glass a favoured… …

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  • 46Guitar — Infobox Instrument name=Guitar names= classification=String instrument (plucked, nylon stringed guitars usually played with fingerpicking, and steel , etc. usually with a pick.) range= (a regularly tuned guitar) related=*Bowed and plucked string… …

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  • 47Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics       Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity.       Computer scientist Manindra Agrawal of the… …

    Universalium

  • 48Europe, history of — Introduction       history of European peoples and cultures from prehistoric times to the present. Europe is a more ambiguous term than most geographic expressions. Its etymology is doubtful, as is the physical extent of the area it designates.… …

    Universalium

  • 49Statue of Liberty — For other uses, see Statue of Liberty (disambiguation). Statue of Liberty Locat …

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  • 50Valley — In geology, a valley (also called a vale, dale, glen or strath and near or in Appalachia, a draw) is a depression with predominant extent in one direction. A very deep river valley may be called a canyon or gorge. The terms U shaped and V shaped… …

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