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GB492413A
|
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Improvements in apparatus for the pneumatic separation of materials of different densities and sizes
|
|
GB380933A
|
|
New coal fuel and method of manufacture for the industrial production of the same
|
|
DE550931C
|
|
Device for oxidizing preheated fuels prior to charring
|
|
GB272522A
|
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Process for the distillation of solid fuels at low temperatures
|
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GB282340A
|
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Improvements in and relating to processes for the distillation of solid fuels at low temperatures
|
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DE508566C
|
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Furnace for the low temperature coking of fuels
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