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ES45954A1909-07-151909-07-15Un procedimiento para fundir y soldar automáticamente los eslabones de cadena, por medio del aparato que se describe.
ExpiredES45954A1
(es)
Un procedimiento para la separación del estaño de la hoja de lata y sus derivados y aprovechamiento de los residuos de la operación para la fabricación de aceros.