vacuum drum
61Otitis media — Classification and external resources A view of the tympanic membrane showing acute otitis media ICD 10 H …
62Ferranti Pegasus — A typical Pegasus computer installation, on view at the Science Museum, London …
63motion-picture technology — Introduction the means for the production and showing of motion pictures. It includes not only the motion picture camera and projector but also such technologies as those involved in recording sound, in editing both picture and sound, in… …
64Boron nitride — IUPAC name Boron nitride Identifiers …
65Pendulum — This article is about pendulums. For other uses, see Pendulum (disambiguation). Simple gravity pendulum model assumes no friction or air resistance …
66Fourdrinier machine — The Fourdrinier Machine is the basis for most modern papermaking, and it has been used in some variation since its conception. The Fourdrinier accomplishes all the steps needed to transform a source of wood pulp into a final paper… …
67Xerography — (or electrophotography) is a photocopying technique developed by Chester Carlson in 1938 and patented on October 6, 1942. He received US patent|2297691 for his invention. Although dry electrostatic printing processes had been invented as far back …
68MythBusters (2008 season) — Country of origin Australia United States No. of episodes 20 (includes 8 specials) Broadcast Original channel Discovery Channel …
69Guitar amplifier — Mesa Boogie Mark IV, a guitar combo amplifier A guitar amplifier (or guitar amp) is an electronic amplifier designed to make the signal of an electric or acoustic guitar louder so that it will produce sound through a loudspeaker. Most guitar… …
70Barometer — Schematic drawing of a simple mercury barometer with vertical mercury column and reservoir at base …
