electric pipes
21environmental 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 …
22Organ (music) — Organ 1741 Pipe organ in Église Saint Thomas, Strasbourg, France. Classification Keyboard instrument (Aerophone) Playing r …
23Drain cleaner — A drain cleaner is a consumer product or device that unblocks sewer pipes or helps to prevent the occurrence of clogged drains; the term may also refer to the individual who performs the activity. Drain cleaners can be classified in three… …
24Water heating — is a thermodynamic process using an energy source to heat water above its initial temperature. Typical domestic uses of hot water are for cooking, cleaning, bathing, and space heating. In industry, both hot water and water heated to steam have… …
25heating — I Process of raising the temperature of an enclosed space. Heat can be delivered by convection, radiation, and thermal conduction. With the exception of the ancient Romans, who developed a form of central heating, most cultures relied on direct… …
26Underfloor heating — Heat can be provided by circulating heated water or by electric cable, mesh, or film heaters.Underfloor heating can be used with concrete and wooden floors, with all types of floor covering (e.g., stone, tile, wood, vinyl, and carpet), and at… …
27Electronic organ — Yamaha GX1, a synthesizer organ in 1970s WERSI Scala, an …
28steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying …
29Pedal keyboard — The 30 note pedalboard of a Rieger organ. A pedalboard (also called a pedal keyboard, pedal clavier, or, with electronic instruments, a bass pedalboard[1]) is a keyboard played with the feet that is usually used to produce the low pitched bass… …
30Central heating — unit A central heating system provides warmth to the whole interior of a building (or portion of a building) from one point to multiple rooms. When combined with other systems in order to control the building climate, the whole system may be a… …
