MAYFIELD VILLAGE, Ohio (AP) ¿ Preformed Line Products Co., which makes products for communications and energy networks, said Monday it completed its purchase of Tyco Electronics' Dulmison business. Dulmison designs, makes and sells pole line hardware and vibration control products for electric utility businesses. Based in Australia, it also does business in Thailand, Indonesia, Malaysia, China, Mexico and the U.S. Preformed Line Products agreed to buy the company in October. Terms were not disclosed. Shares of Preformed Line Products last traded on Friday, when they closed at $43.