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ES6493A1886-11-241886-11-24Un procedimiento para la sublimación del azufre a baja temperatura, obteniéndose flor de azufre impalpable.
ExpiredES6493A1
(es)
Un procedimiento y aparatos propios para transformar en trabajo el calor desarrollado por la combustión empleando los fluidos como órganos de transmisión de movimiento.