In this Friday, Jan. 11, 2013, photo, brake drums roll down a conveyor belt to a station which robotically balances the drum at Webb Wheel Products in Cullman, Ala. Webb Wheel hasn't added a factory worker in three years, though it's making 300,000 more drums annually, a 25 percent increase, because of robots. (AP Photo/Dave Martin)

Associated Press
In this Friday, Jan. 11, 2013, photo, brake drums roll down a conveyor belt to a station which robotically balances the drum at Webb Wheel Products in Cullman, Ala. Webb Wheel hasn't added a factory worker in three years, though it's making 300,000 more drums annually, a 25 percent increase, because of robots. (AP Photo/Dave Martin)
In this Friday, Jan. 11, 2013, photo, brake drums roll down a conveyor belt to a station which robotically balances the drum at Webb Wheel Products in Cullman, Ala. Webb Wheel hasn't added a factory worker in three years, though it's making 300,000 more drums annually, a 25 percent increase, because of robots. (AP Photo/Dave Martin)
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