ES32697A3 - Un procedimiento mecánico para tocar o granear las planchas metálicas de zinc, aluminio, ferroníquel que emplea la industria litográfica.
- Google Patents
Un procedimiento mecánico para tocar o granear las planchas metálicas de zinc, aluminio, ferroníquel que emplea la industria litográfica.
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ES32697A1903-10-121903-10-12Un procedimiento mecánico para tocar o granear las planchas metálicas de zinc, aluminio, ferroníquel que emplea la industria litográfica.
ExpiredES32697A3
(es)
Un procedimiento para la fabricación por soldadura eléctrica directa de objetos metálicos de todas clases en especial de los confeccionados con chapa muy delgada.