External utilities. Еlectrical installations. Cables with plasti cinsulating material for 35 kV including, laying in earth (in tube ditch). Work performancerules
Occupational safety standards system. Respiratory protective devices. Self-contained compressed oxygen and chemical oxygen apparatus for mine rescuers. General specifications
Environmental conditions. Data about influence of vibration and shock effects on electrotechnical equipment. Part 2. Equipment transported in fixed wing jet aircraft