center tube frame
51Movie projector — This article is concerned with technical aspects of moving film projection. For non film movie projection, see digital cinema. For historical aspects, see the article history of cinema. 35 mm movie projector in operation …
52Architecture and Civil Engineering — ▪ 2009 Introduction Architecture For Notable Civil Engineering Projects in work or completed in 2008, see Table (Notable Civil Engineering Projects (in work or completed, 2008)). Beijing was the centre of the world of architecture… …
53Laserdisc — Not to be confused with disk laser, a flat configuration solid state laser. Not to be confused with VCD, DVD, or Blu ray, optical disc formats employing digital video encoding. Not to be confused with CED, a coincident but incompatible analogue… …
54List of Chinese inventions — A bronze Chinese crossbow mechanism with a buttplate (the wooden components have …
55Mountain bike — This article is about mountain bikes themselves. For the associated activity, see Mountain biking. A full suspension mountain bike A mountain bike or mountain bicycle (abbreviated MTB or ATB (all terrain bicycle)) is a bicycle created for off… …
56Heat exchanger — An interchangeable plate heat exchanger Tubular heat exchan …
57Accurizing — is the process of improving the accuracy of a firearm or airgun.cite web |url=http://saami.org/Glossary/index.cfm |title=SAAMI glossary |accessdate=2007 08 30] For firearms, accuracy is defined as the ability to hit exactly what you re aiming at …
58Tricycle — For other uses, see Tricycle (disambiguation). A tricycle (often abbreviated to trike) is a three wheeled vehicle. While tricycles are often associated with the small three wheeled vehicles used by pre school age children, they are also used by… …
59Wind — For other uses, see Wind (disambiguation). Wind, from the …
60Bottom bracket — A square taper cartridge bottom bracket. The bottom bracket on a bicycle connects the crankset to the bicycle and allows the crankset to rotate freely. It contains a spindle that the crankset attaches to, and the bearings that allow the spindle… …
