upper horizontal flue
1Flue pipe — Four flue pipes of a diapason rank. A flue pipe (also referred to as a labial pipe) is an organ pipe that produces sound through the vibration of air molecules, in the same manner as a recorder or a whistle. Air under pressure (referred to as… …
2Vertical boiler with horizontal fire-tubes — Blake boiler A vertical boiler with horizontal fire tubes is a type of small vertical boiler, used to generate steam for small machinery. It is characterised by having many narrow fire tubes, running horizontally. Boilers like this have been… …
3keyboard instrument — ▪ music Introduction any musical instrument on which different notes can be sounded by pressing a series of keys, push buttons, or parallel levers. In nearly all cases in Western music the keys correspond to consecutive notes in the… …
4environmental works — ▪ civil engineering Introduction infrastructure that provides cities and towns with water supply, waste disposal, and pollution control services. They include extensive networks of reservoirs, pipelines, treatment systems, pumping stations …
5industrial glass — Introduction solid material that is normally lustrous and transparent in appearance and that shows great durability under exposure to the natural elements. These three properties lustre, transparency, and durability make glass a favoured… …
6Marcellus Formation — Stratigraphic range: Middle Devonian …
7building 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… …
8Three-drum boilers — Three drum boiler, casing removed …
9Seismic retrofit — Seismic retrofitting is the modification of existing structures to make them more resistant to seismic activity, ground motion, or soil failure due to earthquakes. Other retrofit techniques are applicable to areas subject to tropical cyclones,… …
10Thermal power station — Republika Power Plant, a thermal power station in Pernik, Bulgaria …
