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Petrel Chức năngPetrel bao gồm các nhóm chức năng chính sau:
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Petrel Petrella Salto Petrella Tifernina Petrelë Petrea Petre Ivanovici Petrești, Satu Mare Petrila Petreto-Bicchisano Petrești, DâmbovițaTài liệu tham khảo
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