TOKYO--(BUSINESS WIRE)--Mitsubishi Electric Corporation (TOKYO: 6503) announced today that it produced its four-millionth vacuum interrupter in June 2015, 50 years after launching production of these environmentally friendly devices for interrupting and carrying electric current in vacuums that require no insulation gas. The company is now the largest producer in Japan, and seventh worldwide, on an annual basis. The historic four-millionth vacuum interrupter was produced at Mitsubishi Electric’
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