IEEE Recommended Guide for Measuring Ground Resistance and Potential Gradients in the Earth
NORMA vydaná dňa 30.11.1961
Designation standards: IEEE 81-1962
Note: NEPLATNÁ
Publication date standards: 30.11.1961
Approximate weight : 300 g (0.66 lbs)
Country: International technical standard
Kategória: Technické normy IEEE