adjusting mechanism
21List of membranophones by Hornbostel-Sachs number — The Hornbostel Sachs system of musical instrument classification groups all instruments in which sound is produced primarily through a vibrating membrane. This includes all drums.*2: Instruments in which sound is produced through a vibrating… …
22Tap and die — Not to be confused with Tool and die. Taps and dies are cutting tools used to create screw threads, which is called threading. A tap is used to cut the female portion of the mating pair (e.g., a nut). A die is used to cut the male portion of the… …
23Pedal harp — Harp Classification String instrument (plucked) Playing range …
24Bicycle suspension — refers to the system or systems used to suspend the rider and all or part of the bicycle in order to protect them from the roughness of the terrain over which they travel. Bicycle suspension are used primarily on mountain bicycles, but are also… …
25military technology — Introduction range of weapons, equipment, structures, and vehicles used specifically for the purpose of fighting. It includes the knowledge required to construct such technology, to employ it in combat, and to repair and replenish it.… …
26Telescopic sight — Scope redirects here. For other uses, see Scope (disambiguation). View through a 4x rifle scope. A telescopic sight, commonly called a scope, is a sighting device that is based on an optical refracting telescope. They are equipped with some form… …
27Western concert flute — Flute Other names Transverse flute, Boehm flute, C flute Classification Woodwind Wind Aerophone Playing ran …
28international payment and exchange — ▪ economics Introduction international exchange also called foreign exchange respectively, any payment made by one country to another and the market in which national currencies are bought and sold by those who require them for such… …
29Spinal adjustment — { For the generic approach to manipulation of spinal joints, see Spinal manipulation. A chiropractor performs an adjustment on a patient. Spinal adjustment and chiropractic adjustment are terms used by chiropractors to describe their approaches… …
30Enlarger — An enlarger is a specialised transparency projector used to produce photographic prints from film or glass negatives using the gelatin silver process, or transparencies. All enlargers consist of a light source normally an incandescent light bulb …
