ES116900A1 - Un sistema de reflector para lámparas incandescentes de alumbrado eléctrico, que forma cuerpo inseparable con las mismas.
- Google Patents
Un sistema de reflector para lámparas incandescentes de alumbrado eléctrico, que forma cuerpo inseparable con las mismas.
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ES116900A1930-02-181930-02-18Un sistema de reflector para lámparas incandescentes de alumbrado eléctrico, que forma cuerpo inseparable con las mismas.
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