Basic supporting structures of radioelectronic means. Part 2-4. Sectional specification. Interface co-ordination dimensions for the 25 mm equipment practice. Adaptation dimensions for subracks or chassis applicable in cabinets or racks in accordance with IEC 60297-3-100 (19 in)
Occupational safety standards system. Protective clothing against chemicals. Performance classification and test methods for materials, seams, connections and fastenings of protective clothing against chemicals
