ES29412A3 - Un procedimiento especial para producir el pavonado u oxidación del hierro y del acero, dándoles en ocho horas un color gris-oscuro brillante.
- Google Patents
Un procedimiento especial para producir el pavonado u oxidación del hierro y del acero, dándoles en ocho horas un color gris-oscuro brillante.
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ES29412A1902-03-061902-03-06Un procedimiento especial para producir el pavonado u oxidación del hierro y del acero, dándoles en ocho horas un color gris-oscuro brillante.
ExpiredES29412A3
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