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Priority to ES89010UpriorityCriticalpatent/ES89010Y/en
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Cover-joint washer, made of rigid material and generally disc-shaped, with flat upper and lower surfaces and the internal profile in the shape of a trapezoidal section ring whose ring is adapted by plug and pressure another washer made of elastic material through a shape channel corresponding, whose elastic washer offers an internal protruding ring in its central part and has two terminal wings protruding from the surfaces of the first washer and triangular section. (Machine-translation by Google Translate, not legally binding)
A special key for the assembly of structures composed of profiles provided with holes in their wings (Machine-translation by Google Translate, not legally binding)