chain over gear
71Ceiling fan — A ceiling fan is a fan, usually electrically powered, suspended from the ceiling of a room, that uses hub mounted rotating paddles to circulate air. Casablanca Fan Co. ceiling fan from the early 1980s. A ceiling fan rotates much mo …
72Shaft-driven bicycle — A shaft driven bicycle is a chainless bicycle that uses a driveshaft instead of a chain to transmit power from the pedals to the wheel. Shaft drives were introduced over a century ago, but were mostly supplanted by chain driven bicycles due to… …
73Characters of Kingdom Hearts — A piece of promotional artwork for Kingdom Hearts II Final Mix+ that showcases the main characters of the series; Sora appears twice in the center in two different outfit …
74Cold-weather biking — A bicycle set up for winter commuting with metal studded tires, enclosed chain case, and drum brakes Cold weather biking (also referred to as winter biking, snowbiking or icebiking) is the activity of cycling in winter weather with snow, ice, and …
75Tractor — This article is about a vehicle used in agriculture or construction. For the power unit of a semi trailer truck (articulated lorry), see tractor unit. For other uses, see Tractor (disambiguation) …
76Shifter (bicycle part) — A bicycle shifter or gear control or gear levers is a component used to control the gearing mechanisms and select the desired gear ratio. Typically, they operate either a derailleur mechanism or an internal hub gear mechanism. In either case, the …
77List of U.S. Marine Corps acronyms and expressions — This is a list of acronyms, expressions, euphemisms, jargon, military slang, and sayings in common or formerly common use in the United States Marine Corps. Many of the words or phrases have varying levels of acceptance among different units or… …
78petroleum refining — Introduction conversion of crude oil into useful products. History Distillation of kerosene and naphtha The refining of crude petroleum owes its origin to the successful drilling of the first oil well in Titusville, Pa., in 1859. Prior to… …
79List of United States Marine Corps acronyms and expressions — This is a list of acronyms, expressions, euphemisms, jargon, military slang, and sayings in common or formerly common use in the United States Marine Corps. Many of the words or phrases have varying levels of acceptance among different units or… …
80SR Merchant Navy class — SR Merchant Navy class[1] Official Southern Railway photograph of 21C1 Channe …
