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GB/Z 16935.6-2016 Insulation coordination for equipment within low-voltage systems—Part 2-2:Interface considerations—Application guide 180 (USD) via email in 1-3 business day VALID
GB/Z 16935.2-2013 Insulation coordination for equipment within low-voltage systems—Part 2-1:Application guide—Explanation of the application of the IEC 60664 series, dimensioning example and dielectric testing 840 (USD) via email in 1-8 business day VALID
GB/Z 37754-2019 Guidance on clearances and creepage distances in particular for distances equal to or less than 2 mm—Test results of research on influencing parameters 420 (USD) via email in 1-3 business day VALID