Electrical apparatus for use in the presence of combustible dust. Part 17. Inspection and maintenance of electrical installations in hazardous areas (other than mines)
State system for ensuring the uniformity of measurements. State verification schedule for measuring instruments of standard lightning and switching impulse electrical voltage in the range from 1 to 1000 kV
Resources saving. Best available techniques. Environmentally sound management of wastes consisting of, containing or contaminated with persistent organic pollutants
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