ES67968A2 - Un nuevo procedimiento para conglomerar carbones de todas clases sin necesidad de emplear breas, resinas, alquitranes ni ningún otro aglutinantes.
- Google Patents
Un nuevo procedimiento para conglomerar carbones de todas clases sin necesidad de emplear breas, resinas, alquitranes ni ningún otro aglutinantes.
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ES67968A1918-09-031918-09-03Un nuevo procedimiento para conglomerar carbones de todas clases sin necesidad de emplear breas, resinas, alquitranes ni ningún otro aglutinantes.
ExpiredES67968A2
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