Assertion: flipper's blade portion | /r/HasProperty | provided
Facets:
Source sentences:
text: In document EP-A-0308998 is disclosed a method for the production of a swim fin having the shoe portion made of relatively supple material and the blade portion of a comparatively stiff material, said blade portion being provided with at least one longitudinally extending deformable membrane-like element, this element being obtained by molding the same supple moldable material of the shoe portion into slits formed on the said blade portion.