State system for ensuring the uniformity of measurement. Instruments for measurement of exposure and irradiance in the wavelength range 1 to 10 nm. Verification procedure
Screw plug-gauges with truncated form gaging members for pipe cylindrical thread from 1 3/4'up to 3 3/4' nominal diameter. Construction and basic sizes
Occupational safety standards system. Protective clothing against chemicals. Test method for resistance of materials to permeation by liquids and gases
