Double PO transaction approval

Is there any way to make double approval for a PO transaction? I mean: there are two authorized approvers for a specific transaction. Both must have the same approval rules - different approval groups.

The first one must receive the document since he is the responsible for the Item Type, but the transaction must be automatically forwarded to a second approver since he is the responsible for the Operating Unit. So, the Hierarchy looks like this:

1. RUP : document total - no limit. account range: 05 (company - operating unit).

2. Mantenimiento Manager: document total - no limit. accunt range: 05 (company - operating unit). item category - MANTENIMIENTO