Electrical apparatus for explosive gas atmospheres. Part 19. Repair and overhaul for apparatus used in explosive atmospheres (other than mines or explosives)
Occupational safety standards system. Special footwear for protection against risks in foundries and welding. Part 2. Requirements and test methods for protection against risks in welding and allied processes
State system for ensuring the uniformity of measurements. State verification schedule for means of measuring laser output average power and laser pulse energy within the wavelength range from 0,3 to 12,0 mkm
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