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Un mecanismo de cierre de puertas caracterizado por estar formado en su parto superior por un juego de rodillas o articulaciones sujeto por un extremo al dintel interior de la misma puerta lugar de las bisagras y cuyas articulaciones hacen mover un eje central y que abre o cierra unas válvulas que dan movimiento por compresión a aceite depositado en su fondo y el cual permite frenar en general el movimiento de cerrado automático y en último caso el movimiento final evitando que la puerta se cierre de golpe.
ES118263U1965-12-181965-12-18Un mecanismo de cierre de puertas.
ExpiredES118263Y
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