State system for ensuring the uniformity of measurements. Standard reference data. Vanadium. Lattice parameters. Coeffi cient of linear thermal expansion in the range of temperatures from 240 K to 400 K
Low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. Electrical safety. Equipment for testing, measuring or monitoring of protective measures. Part 4. Resistance of earth connection and equipotential bonding
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