GB/T 18216.4-2012 standard english preview version PDF file download
GB Standard Code
GB/T 18216.4-2012
Standard Category
China National Standards
GB Standard English Title
Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 4: Resistance of earth connection and equipotential bonding
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