tapered plug
31Tweeter — A tweeter is a loudspeaker designed to produce high frequencies, typically from around 2,000 hertz to 20,000 hertz (20,000 Hz, generally considered to be the upper limit of the human hearing). A few tweeters can manage response up to an octave or …
32Diesel engine — Diesel engines in a museum Diesel generator on an oil tanker …
33Fire-tube boiler — A fire tube boiler is a type of boiler in which hot gases from the fire pass through one or more tubes within the boiler. It is one of the two major types of boilers, the other being the water tube boiler. A fire tube boiler can be either… …
34Fish hook — Fishhook redirects here. For other uses, see Fishhook (disambiguation). Anatomy of a fish hook A fish hook is a device for catching fish either by impaling them in the mouth or, more rarely, by snagging the body of the fish. Fish hooks have been… …
355.45x39mm — Infobox Firearm Cartridge name=5.45x39mm M74 caption= origin=flagcountry|Soviet Union type=Rifle service=1974 present used by=Soviet Union/Russian Federation, former Soviet republics wars=Afghan War, Georgian Civil War, First Chechen War, Second… …
36Stopcock — A stopcock is a valve used to restrict or isolate the flow of a liquid or gas through a pipe. In Great Britain a stopcock, not to be confused with a gate valve or a DiCiaccio branch, is used to prevent flow of water into a domestic water system.… …
37Hit and miss engine — A hit and miss engine is a type of four stroke internal combustion engine that was conceived in the late 1800s and was produced by various companies from the 1890s through approximately the 1930s. The name comes from the method of speed control… …
38small arm — small armed, adj. Usually, small arms. a firearm designed to be held in one or both hands while being fired: in the U.S. the term is applied to weapons of a caliber of up to one in. (2.5 cm). [1680 90] * * * ▪ military technology Introduction… …
39Aerospike engine — The aerospike engine is a type of rocket engine that maintains its aerodynamic efficiency across a wide range of altitudes through the use of an aerospike nozzle. It is a member of the class of altitude compensating nozzle engines. A vehicle with …
40Space Shuttle Solid Rocket Booster — The Space Shuttle Solid Rocket Boosters (SRBs) are the pair of large solid rockets used by the Space Shuttle during the first two minutes of powered flight. They are located on either side of the orange external propellant tank. Each SRB produces …
