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ES1875005337A1875-07-241875-07-24Sistema de rejilla de hogar que economiza combustible llamada "rejilla movil a doble efecto de oscilacilacion".
ExpiredES5337H1
(es)
Un fogón con sistema de tiro especial, aplicable a estufas y cocinas, en las que se emplea principalmente como combustible, el serrín de madera y el de corcho.