GB2027157B
(en )
1982-09-22
Recovering pipelines
GB2024286B
(en )
1982-08-11
Oil recovery process
ZA791076B
(en )
1980-04-30
Process for the separation of rare earth elements
GB2031483B
(en )
1982-10-27
Method of recovering petroleum values from suberranean formations
JPS5569543A
(en )
1980-05-26
Recovery of ppaminophenol
JPS557266A
(en )
1980-01-19
Recovery of betaasitosterol
GB1543836A
(en )
1979-04-11
Method of collecting oil from the surface of water
JPS54124508A
(en )
1979-09-27
Method of construction of underground wall
GB2035142B
(en )
1982-08-18
Coal recovery process
CS192971B1
(en )
1979-09-17
Method of extraction of the utility materials notably the pyropes from the underground primary deposits
GB2017783B
(en )
1982-04-28
Process for the extraction of petroleum from underground deposits
JPS557317A
(en )
1980-01-19
Method of burrying underground water drawing pipe
MY8300141A
(en )
1983-12-31
A process for the preparation of water-in oil emulsion containing finely-devided coal
JPS54128401A
(en )
1979-10-05
Recovery of oil from underground
JPS5565696A
(en )
1980-05-17
Method of recovering petroleum
JPS5320632A
(en )
1978-02-25
Method of building underground tank
JPS5577913A
(en )
1980-06-12
Method of throttlinggworking pipe
SU688623A1
(en )
1979-09-30
Method of open-cast mining of mineral deposits
JPS54133708A
(en )
1979-10-17
Method of extraction construction of underground pile
JPS5569544A
(en )
1980-05-26
Recovery of ppaminophenol
JPS5572974A
(en )
1980-06-02
Pipe reviving method
JPS54132820A
(en )
1979-10-16
Repairing method of installed underground pipe
JPS54154108A
(en )
1979-12-05
Method of forming underground structure
JPS5526376A
(en )
1980-02-25
Method of pushing steel pipe into ground
JPS54107117A
(en )
1979-08-22
Continuous underground wall constructing method