Electrical apparatus with protection by enclosure for use in the presence of combustible dusts

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• Electrical apparatus complying with BS 5501 or BS 6941 in the presence of combustible dusts
  著者:: 8096 British Standards Institution
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  著者:: 391003 Lindgren, Erik A.
• Electrical apparatus for the detection of combustible gases in domestic premises
  著者:: 8096 British Standards Institution