diameter-length ratio
21fineness ratio — 1. Aeron. the ratio of the length of a streamlined body, as a rocket or airplane hull, to its maximum diameter. 2. Rocketry. See aspect ratio (def. 4a). * * * …
22focal ratio — noun the ratio of the focal length to the diameter of a (camera) lens system • Syn: ↑f number, ↑stop number, ↑speed • Hypernyms: ↑ratio * * * noun : f number …
23Pipe and tabor — Classification Wind Woodwind Percussion Playing range 1 …
24Steam whistle — A steam whistle is a device used to produce sound with the aid of live steam. Unlike a horn, the sounding mechanism of a whistle contains no moving parts (compare to train horn).The whistle consists of the following main parts, as seen on the… …
25Drill bit — For the fictional character, see Drill Bit (Transformers). For the cancelled skyscraper nicknamed Drill bit, see Chicago Spire. For the types used in drilling wells, see Well drilling. From top to bottom: Spade, lip and spur (brad point), masonry …
26Flag of Portugal — Infobox flag Name = Portugal Use = 110111 Proportion = 2:3 Adoption = June 30 , 1911 Design = A 2:3 vertically striped bicolor of green and red, with the lesser Use2 = 001000 Adoption2 = June 30, 1911 Proportion2 = 12:13 Design2 = As above, but… …
27Flag of Romania — Infobox flag Name = Romania Article = Use = 111111 Symbol = Proportion = 2:3 Adoption =26 June 1848 1 July 1866 27 December 1989 16 July 1994 Design = A vertical tricolour of blue, yellow, and red, with stripes of equal width and blue near the… …
28Plastics extrusion — Cross section of a plastic extruder to show the screw Plastics extrusion is a high volume manufacturing process in which raw plastic material is melted and formed into a continuous profile. Extrusion produces items such as pipe/tubing, weather… …
29Anthropology and Archaeology — ▪ 2009 Introduction Anthropology Among the key developments in 2008 in the field of physical anthropology was the discovery by a large interdisciplinary team of Spanish and American scientists in northern Spain of a partial mandible (lower… …
30Paper size — A size chart illustrating the ISO A series and a comparison with American letter and legal formats …
