单词：explosion-proof electrical equipment
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Ground - Connecting the Earth to electrical equipment with a conductor. This is done so current overloads (perhaps due to a lightning strike) can be safely diverted to the Earth. Ground Fault Circuit
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By Stefan Bos Budapest 08 June 2008 At least 37 miners in Ukraine were trapped underground following a powerful explosion during maintenance work at a coal mine in the eastern city of Donetsk. Officials say the blast destroyed the main shaft of the
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