the valve is made of two portions
1Artificial heart valve — An artificial heart valve is a device implanted in the heart of a patient with heart valvular disease. When one of the four heart valves malfunctions, the medical choice may be to replace the natural valve with an artificial valve. This requires… …
2Railway air brake — Piping diagram from 1920 of a Westinghouse E T Air Brake system on a locomotive …
3Detroit Financial District — U.S. National Register of Historic Places …
4syndrome — The aggregate of symptoms and signs associated with any morbid process, and constituting together the picture of the disease. SEE ALSO: disease. [G. s., a running together, tumultuous concourse; (in med.) a concurrence of symptoms, fr. syn,… …
5Northern Counties Committee — The Northern Counties Committee (NCC) was a railway that served the north east of Ireland. It was built to Irish gauge (1,600 mm (5 ft 3 in)) but later acquired a number of 914 mm (3 ft)  narrow gauge… …
6Three Mile Island accident — The Three Mile Island accident of 1979 was the most significant accident in the history of the American commercial nuclear power generating industry. It resulted in the release of a significant amount of radioactivity, an estimated 43,000 curies… …
7Locations of Half-Life — The Half Life series of video games features many locations set in a dystopian future stemming from the events of the first game, Half Life. These locations are used and referred to throughout the series. The locations, for the most part, are… …
8Spider-Man's powers and equipment — The fateful spider bite that gave Peter Parker his powers. Amazing Fantasy #15, art by Steve Ditko. Spider Man s powers, abilities, and equipment are used by Marvel Comics superhero Spider Man in tandem to combat his many foes. He receives most… …
9Development of Duke Nukem Forever — The video game Duke Nukem Forever spent fifteen years in development, from 1996 to 2011. It is a first person shooter for PC, PlayStation 3 and Xbox 360,[1] developed by 3D Realms, Triptych Games, Gearbox Software and Piranha Games. It is a… …
10Canal de Marseille — The Canal de Marseille [Not to be confused with the canal de Marseille au Rhône , used for navigation or with the canal de Provence, which is the second source of drinking water for Marseille] is a major source of drinking water for the city of… …
