State the four digits numbering series (system) for the following aluminium alloys copper,zinc, silicon?

The four-digit numbering series for aluminium alloys containing copper, zinc, and silicon are as follows:

- Alloys containing copper: 2000 series
- Alloys containing zinc: 7000 series
- Alloys containing silicon: 4000 series

1xxx: Pure aluminium
2xxx: Aluminium-copper alloys
3xxx: Aluminium-manganese alloys
4xxx: Aluminium-silicon alloys

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