首页>
外国专利>
A procedure for the preparation of lignite or Coal, Peat, Wood and the like which are approximated by its Water content and rich in Oxygen,To increase its permanent Heat and desiccation.
A procedure for the preparation of lignite or Coal, Peat, Wood and the like which are approximated by its Water content and rich in Oxygen,To increase its permanent Heat and desiccation.