Mining or in situ disintegration of hard material
Tunnel recovery of fluid material
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active
Determining the locus of a processing zone in an in situ oil sha
Determining the locus of a retorting zone in an oil shale retort
In situ oil shale retorting process using introduction of gas at
Method for establishing a combustion zone in an in situ oil shal
Method for igniting the top surface of oil shale in an in situ r
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