4. Fluid reaction surfaces (i.e., impellers)
  5. Specific blade structure
  6. Tined or irregular periphery

Office Nationale d'Etudes et de Recherches Aerospatiales

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Blade end for rotary wing of an aircraft and rotary wing provide

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Tined or irregular periphery
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Device for chemical dry etching of integrated circuits

Chemistry: electrical and wave energy – Apparatus – Coating – forming or etching by sputtering
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