aperture taper
21keyboard instrument — ▪ music Introduction any musical instrument on which different notes can be sounded by pressing a series of keys, push buttons, or parallel levers. In nearly all cases in Western music the keys correspond to consecutive notes in the… …
22Marendaz Trainer — Trainer Role Trainer National origin United Kingdom Manufacturer Marendaz Aircraft Ltd, Barton in the Clay, Bedfordshire Designer Donald Marendaz?[1] First flight Nove …
23Timeline of Russian inventions and technology records — The Hall of Space Technology in the Tsiolkovsky State Museum of the History of Cosmonautics, Kaluga, Russia. The exhibition includes the models and replicas of the following Russian inventions: the first satellite, Sputnik 1 (a ball under the… …
