plastic pulley
51Outline of forestry — See also: Index of forestry articles The following outline is provided as an overview of and guide to forestry: Forestry – the art and science of managing forests, tree plantations, and related natural resources. Forest ecosystems have come to be …
52Clutch — For other uses, see Clutch (disambiguation). Rear side of a Ford V6 engine, looking at the clutch housing on the flywheel …
53Figure skating — is an athletic sport in which individuals, pairs, or groups perform spins, jumps, footwork and other intricate and challenging moves on ice. Figure skaters compete at various levels from beginner up to the Olympic level (senior), and at local,… …
54Tram — A tram, tramcar, trolley, trolley car, or streetcar is a railborne vehicle, of lighter weight and construction than a train, designed for the transport of passengers (and, very occasionally, freight) within, close to, or between villages, towns… …
55Block — may refer to: * A way of controlling train movement in railway signalling * Postage stamp block, an attached group of postage stampsObjects* A large concrete or stone brick * Block (sailing), a single or multiple pulley used on sailboats *… …
56Mass production — This article is about large scale production. For the Iggy Pop piece, see The Idiot (album). For the American funk band, see Mass Production (band). Mass production (also flow production, repetitive flow production, series production, or serial… …
57Timeline of historic inventions — The timeline of historic inventions is a chronological list of particularly important or significant technological inventions. Note: Dates for inventions are often controversial. Inventions are often invented by several inventors around the same… …
58Jaws (film) — Jaws …
59Circular saw — This miter saw uses a circular saw mounted to cut at an angle Buzzsaw redirects here. For other uses, see Buzzsaw (disambiguation). The circular saw is a machine using a toothed metal cutting disc or blade. The term is also loosely used for the… …
60Ladder — A ladder is a vertical or inclined set of rungs or steps. There are two types: rigid ladders that can be leaned against a vertical surface such as a wall, and rope ladders that are hung from the top. The vertical members of a rigid ladder are… …
