Classification opinions
… Adoption : 1959 … 2. Angles, perforated, prepared for use in the assembly of metal structures (racks, sets of … for the purpose of securing, by means of special bolts, various types of equipment (machines, railway track, … of a length of up to 10 m and a width of from 0.30 to 1 m, used in buildings, (in casting concrete floors, etc.). …