BR8800186A
(en )
1988-08-30
METHOD FOR TREATING UNDERGROUND FORMATIONS
FI860470L
(en )
1986-08-09
TUGGBART MINERAL SUPPLEMENT.
GB2135449B
(en )
1985-10-16
Borehole survey system
MX147050A
(en )
1982-09-27
IMPROVEMENTS IN TELEMETRY SYSTEM FOR WELL DRILLING
IT8748480A0
(en )
1987-10-09
CONVEYOR, PARTICULARLY FOR UNDERGROUND ROUTES IN MINE
FI873287A7
(en )
1987-07-28
New collectors for mineral flotation.
MX155676A
(en )
1988-04-12
IMPROVEMENTS IN ROCK CRUSHER
MX151532A
(en )
1984-12-13
IMPROVED TOOL FOR THE RECOVERY OF MINERALS
GB2149357B
(en )
1987-12-09
Clearing device for land mines
ES551196A0
(en )
1986-11-16
MACHINE TO OPEN GALLERIES OR EXTRACT MINERALS
ES554083A0
(en )
1987-01-01
IMPROVEMENTS IN TEETH FOR EARTH MOVING EQUIPMENT
ZA86728B
(en )
1986-09-24
Device for drilling in rock,ore or the like
MX157900A
(en )
1988-12-20
IMPROVEMENTS IN THE PLOW MINING FACILITY FOR THE EXTRACTION OF MINERALS
ES527772A0
(en )
1985-06-16
PROCEDURE FOR MILLING MINERALS
MX159379A
(en )
1989-05-22
IMPROVEMENTS IN THE SHEAR LOADER FOR THE EXTRACTION OF MINERALS
FI885170A7
(en )
1988-11-10
Method for drilling minerals
ES547105A0
(en )
1986-07-16
PLANING PLANTS FOR THE EXTRACTION OF MINERALS
BR8502018A
(en )
1985-12-31
METHOD AND APPLIANCE FOR PROCESSING MINERAL CONTAINING MINING
MX156697A
(en )
1988-09-27
IMPROVED METHOD FOR THE DIRECT REDUCTION OF IRON MINERALS
GB8511145D0
(en )
1985-06-12
Device for use in underground mining
ZA856555B
(en )
1986-04-30
Self-propelling unit for the processing of coal in an open-air mine
IT8348849A0
(en )
1983-08-12
SAFE FOR LAND MINE
IE872127L
(en )
1988-02-11
Cutting element for use in coal mines
BR8206345A
(en )
1984-06-05
IMPROVEMENT IN MACHINE FOR EXTRACTION OF PILES DRILLED IN THE GROUND
GB2116226B
(en )
1985-06-26
Apparatus for sinking wells in the ground