Perforations
I.Perforations
Most perforated materials have round, square, slot or oblong holes.
Round hole perforation
Square hole perforation
Slot hole perforation
in staggered rows
in straight rows
II.Hole position, hole arrangement
For round hole perforations
in staggered rows
staggered 45°
in straight rows
For square hole perforations
in staggered rows
staggered 45°
in straight rows
For slot hole perforations
in staggered rows
in straight rows
in rows staggered to each other