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GB/T 13813-2023 Safety Test method and judgment rules for friction sparks of metal materials used in coal mines - 英文版 |
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GB/T 13813-2008 Testing method and judging rule of safety to friction spark of metallic material for coal mine - 英文版 |
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GB/T 20061-2006 Test method and judgment of anti-deflagration property of permissible explosive - 英文版 |
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GB 18097-2000 Test method and ajudgment of safety of permissible explosive in inflammable gas - 英文版 |
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