dual demand valve
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Variable valve timing — Variable valve timing, or VVT, is a generic term for an automobile piston engine technology. VVT allows the lift or duration or timing (some or all) of the intake or exhaust valves (or both) to be changed while the engine is in operation. Two… … Wikipedia
Diving cylinder — Diving cylinders to be filled at a diving air compressor station … Wikipedia
Doing It Right — DIR diver Doing It Right (DIR) is a holistic approach to scuba diving. According to the DIR approach fundamental skills, teamwork, environmental awareness, and the use of a highly optimized/streamlined (i.e. minimalistic) equipment configuration… … Wikipedia
Backflow prevention device — See also: Backflow (plumbing) In this situation, dirty water from the hillside pool will back siphon or back flow down the hosepipe and into the clean water tank. To prevent this from happening, the house s external tap should be fitted with a… … Wikipedia
List of generic and genericized trademarks — Contents 1 List of former trademarks that have become generic terms 2 List of protected trademarks frequently used as generic terms 3 Notes 4 References … Wikipedia
Business and Industry Review — ▪ 1999 Introduction Overview Annual Average Rates of Growth of Manufacturing Output, 1980 97, Table Pattern of Output, 1994 97, Table Index Numbers of Production, Employment, and Productivity in Manufacturing Industries, Table (For Annual… … Universalium
building construction — Techniques and industry involved in the assembly and erection of structures. Early humans built primarily for shelter, using simple methods. Building materials came from the land, and fabrication was dictated by the limits of the materials and… … Universalium
Artificial pacemaker — Cardiac resynchronization therapy and CRT (Cardiac Resynchronization Therapy) redirect here. For the device termed a CRT D, see Implanted cardiac resynchronization device. For other uses, see Pacemaker (disambiguation). A pacemaker, scale in… … Wikipedia
Motorcycle engine — A Honda Super Cub engine. The most popular motorcycle in history, with over 60 million produced … Wikipedia
Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… … Wikipedia
Dodge Ram — This article is about the full size truck. For other uses such as the full size van, see Dodge Ram (disambiguation). Dodge Ram Manufacturer Chrysler Production 1981–present … Wikipedia
