HUT43879A
(en )
1987-12-28
Improved method for multi-stage recovering coal layer
DE3567579D1
(en )
1989-02-23
Method of separating carbon monoxide
EP0200879A3
(en )
1987-10-07
Coal slurry system
CS26986A2
(en )
1990-06-13
Method of activated carbon production
GB8618092D0
(en )
1986-09-03
Lining of tunnels
GB8701249D0
(en )
1987-02-25
Mine haulage method
ZA868599B
(en )
1987-06-24
Method for passivating particulate coal
EP0220013A3
(en )
1988-03-02
Method of dewatering brown coal
AU6173786A
(en )
1988-02-25
Method of processing coal gas
PL268457A1
(en )
1988-11-24
Method of desalting hard coal tars and pitches
HUT37969A
(en )
1986-03-28
Method and apparatus for mining steep mineral bed, particularly steep coal one
PL254908A3
(en )
1987-02-23
Method of regenerating cutting tools,in particular tangential and radial ones,of a mechanical coal miner
PL261183A1
(en )
1987-07-27
Method of intensifying coal grinding processes
PL254907A3
(en )
1987-02-23
Method of regenerating rotary cutting tools of mechanical coal miners
PL254688A1
(en )
1987-02-23
Method of regenerating cutting tools,in particular radial and tangent ones,of a mechanical coal miner
PL252637A1
(en )
1986-10-07
Method of forecasing risks of crumps in particular in coal mines
PL253154A1
(en )
1986-11-18
Method of mining coal deposits and mechanical coal miner therefor
PL257187A1
(en )
1987-09-07
Method of regenerating mechanical miner's cutters
PL255820A1
(en )
1987-06-15
Method of extracting coal using a longwall system
PL247794A1
(en )
1985-12-03
Method of regenerating worn files
PL255889A1
(en )
1987-05-04
Method of permanent cut slope mining in an open pit mine
BG47294A1
(en )
1990-06-15
Diamond drilling crown
BG41917A1
(en )
1987-09-15
Method for alkylation of coal
SU1283420A1
(en )
1987-01-15
Method of locating outburst-hazardous zones of coal seam
PL261724A1
(en )
1988-05-26
Method of mining thick and steep coal deposits