spring tension
21Derailleur gears — Transmission types Manual Sequential manual Non synchronous Preselector Automatic Manumatic Semi automatic Electrohydraulic Dual …
22Accretion disc — An accretion disc (or accretion disk) is a structure (often a circumstellar disk) formed by diffuse material in orbital motion around a central body. The central body is typically either a young star, a protostar, a white dwarf, a neutron star,… …
23Parker Fly — Infobox Guitar model|title=Parker Fly manufacturer=Parker Guitars period=1993 Present. bodytype=Solid Double Cut necktype=Set scale= 25.5 woodbody=Various tone woods with a carbon fibre exoskeleton woodneck= Various tone woods with a carbon fibre …
24Ibanez ZR — The Ibanez ZR (Zero Resistance) Tremolo is a double locking tremolo system that was derived from Ibanez Edge and Floyd Rose, but it functions closer to that of a Kahler Tremolo System. The ZR tremolo offers a number of improvements from the… …
25Commutator (electric) — This article is about the electrical component. For mathematical concept, see Commutator . A tiny 5 segment commutator less than 2 mm in diameter, on a direct current motor in a toy radio control ZipZaps car. A commutator is a rotary electri …
26Longboard (skateboard) — This page is about skating Longboards, see longboard (surfing) for information about longboards of the surfboard variety. A longboard is a skateboard with a longer and sometimes wider shape used for longboarding. They are most commonly used for… …
27Magnetorotational instability — The magnetorotational instability or MRI is a fluid instability that arises when the angular velocity of a magnetized fluid decreases as the distance from the rotation center increases. It can also be known as the Velikhov Chandrasekhar… …
28Wilberforce pendulum — A Wilberforce pendulum, invented by British physicist Lionel Robert Wilberforce around 1896 [cite journal|last=Wilberforce|first=Lionel Robert|date=1896|title=On the vibrations of a loaded spiral spring|journal=Philos. Mag.|volume=38|pages=386… …
29Nipple clamp — Nipple clamps with chain applied A nipple clamp is a clamp that can be applied to the nipples of either men or women. It is a sex toy which can be attached to the nipples to create pain by restricting blood flow from erect nipples by applying… …
30Whip-a-way — (tm):ConsumerA seven (7) section, tubular, folding whip antenna. A plastic covered cable (or braided plastic cord) under spring tension is threaded through the sections to keep them together when assembled for operation and prevent their… …
