4. Fluid reaction surfaces (i.e., impellers)
  5. Unsymmetrical impeller or dissimilar working members

SPAL S.r.l.

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Axial flow fan

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Cantilever blade
Reexamination Certificate

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Axial flow fan

Fluid reaction surfaces (i.e. – impellers) – Unsymmetrical impeller or dissimilar working members
Reexamination Certificate

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