mud riser
21National Oilwell Varco — Type Private (NYSE: NOV) Industry Oil Well Services Equipment Founded …
22Steam drum — Steam drums are a regular feature of water tube boilers. It is a reservoir of water/steam at the top end of the water tubes in the water tube boiler. They store the steam generated in the water tubes and act as a phase separator for the… …
23Liste von Abkürzungen (Computer) — Dies ist eine Liste technischer Abkürzungen, die im IT Bereich verwendet werden. Inhaltsverzeichnis A B C D E F G H I J K L M N O P Q R S T U V W X Y Z siehe auch: Liste von Dateiendu …
24Bicycle — For other uses, see Bicycle (disambiguation). A mountain bike, a popular multi use bicycle. A bicycle, also known as a bike, pushbike or cycle, is a human powered, pedal driven, single track vehicle, having two wheels attached to a frame, one… …
25Cottingley Fairies — The first of the five photographs, taken by Elsie Wright in 1917, shows Frances Griffiths with the alleged fairies. The Cottingley Fairies appear in a series of five photographs taken by Elsie Wright and Frances Griffiths, two young cousins who… …
26Lime kiln — A lime kiln is a kiln used to produce quicklime by the calcination of limestone (calcium carbonate). The chemical equation for this reaction is::CaCO3 + heat → CaO + CO2This reaction takes place at 900°C (at which temperature the partial pressure …
27Shaft construction — concerns the building of vertical openings such as Raises and Shafts. Shafts are vertical openings used for supplying equipment, personnel, and support systems to the horizontal tunnel where the pipeline is installed. They can be temporary or… …
28Wild fisheries — A fishery is an area with an associated fish or aquatic population which is harvested for its commercial value. Fisheries can be marine (saltwater) or freshwater. They can also be wild or farmed. This article is an overview of the habitats… …
29Elevator — For other uses, see Elevator (disambiguation). A set of lifts in the lower level of a London Underground station. The arrows indicate each elevator s position and direction of travel …
30Fées de Cottingley — Panneau (signpost) du village de Cottingley, faisant référence aux fées. Les fées de Cottingley, ou l’affaire des fées de Cottingley, fait référence à une célèbre série de cinq photographies prises au début du XXe siècle par Elsie Wright et …
