GB2139669B
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1986-07-02
Method of recovering hydrocarbons from an underground formation
GB8819961D0
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1988-09-21
Method of mining & gasifying underground coal
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1988-12-22
Method for underground mining of useful deposits
SU1488490A1
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1989-06-23
Method of mining thick disturbed mineral deposits
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1989-06-23
Method of mining mineral deposits
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1989-06-23
Method of mining mineral deposits
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1990-09-15
Method of open mining of mineral deposits
GB2158854B
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1987-09-16
Method of recovering hydrocarbons from an underground formation
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1985-12-17
Method of mining deposits
SU1592496A1
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1990-09-15
Method of mining ore deposits
PL248835A1
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1986-02-11
Method of mining sulfur deposits
PL248837A1
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1986-02-11
Method of mining sulfur deposits
PL249421A1
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1986-03-11
Method of mining sulfur deposits
PL277353A1
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1989-09-18
Method of mining vein-type ore deposits of small thickness
PL133408B2
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1985-05-31
Method of safely mining sulfur deposits using the underground smelting process
SU1488484A1
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1989-06-23
Method of mining steep coal seam
SU1488446A1
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1989-06-23
Method of underground dissolving of salt deposits
PL248452A2
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1985-05-07
Method of mining coal residues from coal deposits
PL294872A1
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1993-12-13
Method of underground mining mineral deposits
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1992-06-15
Method of underground mining brown coal deposits
PL264072A1
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1988-09-29
Method for making walls of underground objects
PL294106A1
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1992-09-07
Method of mining sulfur deposits
PL281441A1
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1991-03-25
Method for nderground mining of thick hard coal deposits wioth significant inclination
PL261724A1
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1988-05-26
Method of mining thick and steep coal deposits
PL252355A1
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1985-12-03
Underground coal mining method