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ES33500A1904-02-261904-02-26El nuevo grifo o clave regulador para servicio de agua combinado con el depósito para constituir el desagüe intermitente.
ExpiredES33500A1
(es)
El procedimiento denominado "sistema Volta de compartimiento estanco" para la instalación de maquinaria para elevación de agua en pozos de riego, con emplazamiento por debajo del nivel más alto de agua.