corrugated sheet
111History of the single-lens reflex camera — The history of the single lens reflex camera predates the invention of photography in 1826/27 by one and a half centuries with the use of a reflex mirror in a camera obscura first described in 1676. Such SLR devices were popular as drawing aids… …
112Building insulation materials — A selection of insulation materials can aid in building insulation. All of these are based on standard principles of thermal insulation. Materials used to reduce heat transfer by conduction, radiation or convection are employed in varying… …
113Prepress proofing — Main article: Prepress A Contract Proof[1] usually serves as an agreement between customer and printer and as a color reference guide for adjusting the press before the final press run.[2] Most contract proofs are a Prepress Proof.[3] The primary …
114Duralumin — Fire damaged Duralumin cross brace from the frame of the Zeppelin airship Hindenburg (DLZ129) salvaged from the crash site at Lakehurst Naval Air Station, NJ, on May 6, 1937 Duralumin (also called duraluminum, duraluminium or dural) is the trade… …
115Polystyrene — For other uses, see Polystyrene (disambiguation). Expanded polystyrene packaging …
116Beverage can — pop top redirects here. For the software company, see PopTop Software. pop cap redirects here. For the software company, see PopCap Games. The stay tab opening mechanism characteristic of most post 1980s drinking cans A beverage can is a tin can… …
117Radio-controlled aircraft — A radio controlled aircraft (often called RC aircraft or RC plane) is a model aircraft that is controlled remotely, typically with a hand held transmitter and a receiver within the craft. The receiver controls the corresponding servos that move… …
118Steel frame — usually refers to a building technique with a skeleton frame of vertical steel columns and horizontal I beams, constructed in a rectangular grid to support the floors, roof and walls of a building which are all attached to the frame. The… …
119Bivouac shelter — A bivouac (pronounced [http://cougar.eb.com/soundc11/b/bivoua01.wav /ˈbɪvuˌæk/, biv oo ak] ) traditionally refers to a military encampment made with tents or improvised shelters, usually without shelter or protection from enemy fire or such a… …
120Sewage treatment — The objective of sewage treatment is to produce a disposable effluent without causing harm to the surrounding environment, and also prevent pollution.[1] Sewage treatment, or domestic wastewater treatment, is the process of removing contaminants… …
