∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF∥≈∥PVDF