Anodic earthing of the electrochemical protective installations against corrosion of underground metal constructions. Methods for determining the biocorrosion aggressiveness of soils and their impact on underground metal constructions
State system for ensuring the uniformity of measurements. State primary standard and state verification schedule for measuring means of magnetic inductance of static field in the range from 1x10 in minus 12 degree up to 5x10 in minus 2 degree T, constant magnetic flux, magnetic inductance and magnetic moment in frequency band from 0 - 20000 Hz
