GB2161847B
(en )
1987-08-12
Coal seam fracing method
PL253787A1
(en )
1986-09-23
Coal reclaiming method
GB8312564D0
(en )
1983-06-08
Recovering hydrocarbons from underground formation
ZW12387A1
(en )
1987-09-30
Mining method
GB8701249D0
(en )
1987-02-25
Mine haulage method
PL268423A1
(en )
1989-05-02
Method of water desalting,especially coal mine water
DE3176764D1
(en )
1988-07-07
Improved coal liquefaction process
HUT36223A
(en )
1985-08-28
Stripper, preferably for mining coal
PL262704A1
(en )
1988-06-23
Method for mining coal deposits having variable angles
PL255141A4
(en )
1986-07-01
Cutter-loader for mining steep coal deposits
ZA874756B
(en )
1988-02-24
Mining method
GB2190940B
(en )
1989-12-13
Mineral mining apparatus
PL262571A1
(en )
1988-09-01
A method for mining thick deposits
PL272787A2
(en )
1989-03-06
Method for mining thick hard coal deposits having high inclination
GB8412476D0
(en )
1984-06-20
Recovering hydrocarbons from underground formation
PL261146A1
(en )
1988-05-26
Deposit mining method
PL252355A1
(en )
1985-12-03
Underground coal mining method
PL249392A2
(en )
1985-07-02
Mechanized roof supports for mining steep coal deposits
PL257271A1
(en )
1987-09-07
Mine scraper conveyor lock
PL255142A2
(en )
1986-07-01
Machine for mining thin steep coal deposits
PL281441A1
(en )
1991-03-25
Method for nderground mining of thick hard coal deposits wioth significant inclination
ZM5387A1
(en )
1988-04-29
Mining method
ZM5287A1
(en )
1988-04-29
Mining method
ZA874755B
(en )
1988-02-24
Mining method
SU1145711A1
(en )
1994-08-30
Petroleum mining method