Classification opinions
… Adoption : 1959 … 3. Bowls, of iron or steel, obtained by "impact extrusion", not having acquired the approximate … serve to clamp and hold planks or pieces to be worked by cutting, drilling, etc., or they may be used as a … (22 mm in diameter) with a clasp to hold keys, attached by a chain (20 mm long) to a small case of plastics …