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​Gas tungsten arc welding (GTAW), also known as tungsten inert gas (TIG) welding, is an arc welding process that uses a non-consumable tungsten electrode to produce the weld. The weld area and electrode are protected from oxidation or other atmospheric contamination by an inert shielding gas (argon or helium). A filler metal is normally used, though some welds, known as autogenous welds, or fusion welds do not require it. When helium is used, this is known as heliarc welding. A constant-current welding power supply produces electrical energy, which is conducted across the arc through a column of highly ionized gas and metal vapors known as a plasma. GTAW is most commonly used to weld thin sections of stainless steel and non-ferrous metals such as aluminum, magnesium, and copper alloys. The process grants the operator greater control over the weld than competing processes such as shielded metal arc welding and gas metal arc welding, allowing for stronger, higher quality welds. However, GTAW is comparatively more complex and difficult to master, and furthermore, it is significantly slower than most other welding techniques. A related process, plasma arc welding, uses a slightly different welding torch to create a more focused welding arc and as a result is often automated.

​Staffordshire (/ˈstæfərdˌʃɪər, -ʃər/;[2] postal abbreviation Staffs.) is a landlocked county in the West Midlands of England. It borders Cheshire to the northwest, Derbyshire and Leicestershire to the east, Warwickshire to the southeast, West Midlands and Worcestershire to the south, and Shropshire to the west.

The largest settlement in Staffordshire is Stoke-on-Trent, which is administered as an independent unitary authority, separately from the rest of the county. Lichfield, a smaller settlement, is a cathedral city. Other major settlements include Stafford, Burton upon Trent, Cannock, Newcastle-under-Lyme, Rugeley, Leek, and Tamworth.

Smaller towns include Stone, Cheadle, Uttoxeter, Burntwood/Chasetown, Eccleshall, Biddulph, Penkridge and the large villages of Wombourne, Kinver, Tutbury, Alrewas, Barton-under-Needwood, Stretton and Abbots Bromley. Cannock Chase AONB is within the county as well as parts of the National Forest and the Peak District national park.

Wolverhampton, Walsall, West Bromwich and Smethwick are within the historic county boundaries of Staffordshire, but since 1974 have been part of the West Midlands county.

Apart from Stoke-on-Trent, Staffordshire is divided into the districts of Cannock Chase, East Staffordshire, Lichfield, Newcastle-under-Lyme, South Staffordshire, Stafford, Staffordshire Moorlands, and Tamworth.

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