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BR8102312A
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Process for the conversion of coal, turf or wood in gaseous or volatile distilles
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Concomitant hydrofining and hydrocracking of carbonaceous materials
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Desulphurizing petroleum
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Process for conversion of coal to gaseous hydrocarbons
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Process for developing petroleum waste
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Regeneration of absorbents used in desulfurizing fossil fuels
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Desulfurizing fossil fuels
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De-sulfurization of petroleum residues
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Grapples
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Extraction of copper from copper sulfides
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Extraction of zinc and lead from their sulphides
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Extraction of metals from their sulphides
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Extraction of zinc or lead from their sulphides
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Fastener-washer combination
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Device for use in developing a square putting stroke
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Telephone switching system with line hunting
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