battery of diffusers

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• VRLA battery — A valve regulated (sealed) lead–acid battery A VRLA battery (valve regulated lead–acid battery) is a type of low maintenance lead–acid rechargeable battery. Because of their construction, VRLA batteries do not require regular addition of water to …   Wikipedia

• VRLA — stands for valve regulated lead acid and is the designation for low maintenance lead acid batteries, also called recombinant batteries. [ David Linden, Thomas B. Reddy (ed). Handbook Of Batteries 3rd Edition. McGraw Hill, New York, 2002 ISBN 0 07 …   Wikipedia

• Light-emitting diode — LED redirects here. For other uses, see LED (disambiguation). Light emitting diode Red, pure green and blue LEDs of the 5mm diffused type Type Passive, optoelectronic Working principle Electr …   Wikipedia

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• Leica R8 — The Leica R8 is a manual focus 35 mm single lens reflex camera produced by the German firm of Leica as part of their R series of cameras. Development began in 1990:cite web|url=http://www.imx.nl/photosite/leica/rseries/designr8e.html|title=Leica… …   Wikipedia

• Leica R9 — Infobox Camera camera model = R9 manufacturer = Leica camera type = Still image camera sensor type = Film sensor size = 24 times;36 mm recording medium = 135 film lens system = Leica R bayonet focus type = Manual shutter speeds=1/8000 to 32 s… …   Wikipedia

• Ring flash — A ring flash, invented by Lester A. Dine, in 1952 originally for use in dental photographyFact|date=January 2008, is a circular photographic flash that fits around the lens, especially for use in macro (or close up) photography. Its most… …   Wikipedia

• 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