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  • Electric resistance welding


    Electric resistance welding (ERW) refers to a group of welding processes such as spot and seam welding that produce coalescence of faying surfaces where heat to form the weld is generated by the electrical resistance of material combined with the time and the force used to hold the materials together during welding. Some factors influencing heat or welding temperatures are the proportions of the workpieces, the metal coating or the lack of coating, the electrode materials, electrode geometry, electrode pressing force, electrical current and length of welding time. Small pools of molten metal are formed at the point of most electrical resistance (the connecting or "faying" surfaces) as an electrical current (100–100,000 A) is passed through the metal. In general, resistance welding methods are efficient and cause little pollution, but their applications are limited to relatively thin materials and the equipment cost can be high (although in production situations the cost per weld may be low).

  • Bill Weld


    William Floyd Weld (born July 31, 1945) is an American attorney, businessman, and politician who was the 68th Governor of Massachusetts from 1991 to 1997. He was the Libertarian Party's nominee for Vice President of the United States in the 2016 election, sharing the ticket with Gary Johnson. Johnson and Weld were together the first presidential ticket since 1948 to consist of two state governors. A libertarian Republican, Weld was the United States Attorney for the District of Massachusetts from 1981 to 1986, focusing on a series of high-profile public corruption cases, and as the head of the Department of Justice Criminal Division from 1986 to 1988. He resigned from the latter position in 1988, along with the Deputy Attorney General, in protest of an ethics scandal and associated investigations of Attorney General Ed Meese III. He was elected Governor of Massachusetts in 1990 and was in office from 1991 to 1997. He was re-elected by the largest margin in Massachusetts' history in 1994 and was the Republican nominee for the United States Senate in 1996, losing to incumbent Democrat John Kerry.

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