safety hubs
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hub — [1] On a bicycle, the center of a wheel consisting of a shell to which spokes attach and contains an axle along with two sets of bearings, bearing cones, lockwasher, locknuts, and parts for attaching the wheel to the frame. [2] The base of a… … Dictionary of automotive terms
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Bicycle brake — Animation of a single pivot side pull calliper brake for the rear wheel of a steel framed road bike. A bicycle brake is used to slow down or stop a bicycle. There have been various types of brake used throughout history, and several are still in… … Wikipedia
Alaska Airlines — IATA AS ICAO ASA Callsign ALASKA … Wikipedia
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Principles of Intelligent Urbanism — (PIU) is a theory of urban planning composed of a set of ten axioms intended to guide the formulation of city plans and urban designs. They are intended to reconcile and integrate diverse urban planning and management concerns. These axioms… … Wikipedia
Bicycle brake systems — are used to slow down, or brake a bicycle. There have been various types through history, and several are still in use today.HistoryEarly bicycles such as the high wheeled penny farthing bikes were fitted with spoon brakes. As they were fixed… … Wikipedia
