Square hole | Circle hole | Irregular circle hole | |
---|---|---|---|
Holes type | 3*3mm 5*5mm 10*10mm 12*12mm |
Φ6mm (pitch:18mm) Φ8mm (pitch:25mm) Φ12mm (pitch:25mm) Φ15mm (pitch:30mm) |
Φ6/10 Φ12/20 Φ35/20/12 Φ20/15/8 |
Perforation rate | 13.4%-17.2% | 8.7%-19.6% | 8.7%-18.1% |
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