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  • DL(Electricity & Power)
  • DZ(Geology & Mineralogy)
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  • JB(Machinery)
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  • MT(Coal)
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  • SY(Oil & Gas)
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  • YB(Ferrous Metallurgy)
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Database: 365,228(8 Aug 2026)
GB 38031 Electric vehicle safety GB 4943 GB 30000 IMT-2020 GB 17820
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