Tôles perforées pour tamisage industriel — Partie 2: Épaisseur inférieure à 3 mm

Describes three patterns using round (circular) and square perforations. The sizes of holes range down to 2 mm for square holes and to 0.5 mm for round holes. Five ratios of pitch to hole are specified which result in nominal open areas ranging from about 60 % to 23 %.