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Masse på polyglycolbasis til fremstilling af vandopløselige formdele, især kærner til voksmodeller, samt fremgangsmåde til fremstilling af sådanne formdele deraf.
Procedimiento para la fabricacion de las partes iniciales y terminales en cierres de cremallera con cadenas de eslabones de cierre de plastico y dispositivo para la realizacion del procedimiento.
Metodo de fabricacion de piezas moldeadas a base de cementou hormigon, utilizando moldes perdidos, que quedan incorpo- rados a la pieza como embalaje protector.