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Apparatus for making building material
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Valve
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Building material and method of making the same
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Process for improving fuel
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Coal treating process and apparatus
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Underground gasification of carbonaceous material-bearing substances
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Valve
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Process and apparatus for superheating steam
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Process of destructive disthllation of carbonaceous material
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Method of improving the properties of solid fuel by low-temperature carbonization
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Retort
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Process and apparatus for carbonizing coal
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Destructive distillation of solid carbonizable material
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Leaching and treating apparatus
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Distillation of solid carbonaceous material
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CA366564A
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Gas and oil production
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CA366563A
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Solid carbonizable material distillation
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CA366735A
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Carbonaceous material distillation
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