electric welding set
121Norman, Oklahoma —   City   …
122Electrician — An electrician is a tradesman specializing in electrical wiring of buildings and related equipment. Electricians may be employed in the installation of new electrical components or the maintenance and repair of existing electrical infrastructure …
123Spark-gap transmitter — A spark gap transmitter is a device for generating radio frequency electromagnetic waves. These devices served as the transmitters for most wireless telegraphy systems for the first three decades of radio (1887 ndash;1916) and the first… …
124SR West Country and Battle of Britain Classes — Infobox Locomotive powertype=Steam name = SR Un rebuilt West Country/Battle of Britain Classes Herring, pp. 160 ndash;161] caption = Un rebuilt West Country Class 21C123 Blackmoor Vale , as preserved, in Southern Railway Malachite Green and… …
125SR Merchant Navy Class — Infobox Locomotive powertype=Steam name = SR Merchant Navy ClassHarvey] caption = Official Southern Railway photograph of 21C1 Channel Packet as built, 1941. designer = Oliver Bulleid builder = SR Eastleigh Works builddate = 1941 ndash;1949… …
126Drill — For other uses, see Drill (disambiguation). Drill scheme A drill or drill motor is a tool fitted with a cutting tool attachment or driving tool attachment, usually a drill bit or driver bit, used for drilling holes in various materials or… …
127Olkiluoto Nuclear Power Plant — Olkiluoto island with two existing nuclear power plants. Operation of the third unit is currently scheduled to start in 2014. (Image manipulated) …
128Oxygen — This article is about the chemical element and its most stable form, O2 or dioxygen. For other forms of this element, see Allotropes of oxygen. For other uses, see Oxygen (disambiguation). nitrogen ← oxygen → fluorine ↑ O ↓ …
