vacuum holder
71Diamond — This article is about the mineral. For the gemstone, see Diamond (gemstone). For other uses, including the shape ◊, see Diamond (disambiguation) …
72Head of state — This article is about the political term. For other uses, see Head of state (disambiguation). A head of state is the individual that serves as the chief public representative of a monarchy, republic, federation, commonwealth or other kind of… …
73Italy — Italia redirects here. For other uses, see Italia (disambiguation). This article is about the republic. For other uses, see Italy (disambiguation). Italian Republic …
74Iridium — (pronEng|ɪˈrɪdiəm) is a chemical element that has the symbol Ir and atomic number 77. A very hard, brittle, silvery white transition metal of the platinum family, iridium is the second densest element and is the most corrosion resistant metal,… …
75Tea — For other uses, see Tea (disambiguation). Tea Longjing tea being infused in a glass …
76Smoke testing — is a term used in plumbing, woodwind repair, electronics, computer software development, and the entertainment industry. It refers to the first test made after repairs or first assembly to provide some assurance that the system under test will… …
77Incandescent light bulb — The incandescent light bulb, incandescent lamp or incandescent light globe is a source of electric light that works by incandescence, (a general term for heat driven light emissions which includes the simple case of black body radiation). An… …
78Fountain pen — A fountain pen is a nib pen that, unlike its predecessor the dip pen, contains an internal reservoir of water based liquid ink. From the reservoir, the ink is drawn through a feed to the nib and then to the paper via a combination of gravity and… …
79Trinitron — A 1985 27 Trinitron Trinitron is Sony s brand name for its line of aperture grille based CRTs used in television sets and computer display monitors. One of the first truly new television systems to enter the market since the 1950s, the Trinitron… …
80Optical telescope — Eight Inch refracting telescope (Chabot Space and Science Center) An optical telescope is a telescope which is used to gather and focus light mainly from the visible part of the electromagnetic spectrum for directly viewing a magnified image for… …
