ZA852845B
(en )
1985-11-27
Method of manufacturing cutter elements for drill bits
GB2161847B
(en )
1987-08-12
Coal seam fracing method
PL251853A1
(en )
1985-10-22
Arrangement of cutting tools in particular for a coal planer
PL253787A1
(en )
1986-09-23
Coal reclaiming method
PL247253A1
(en )
1985-10-22
Method of manufacturing mining tool in particular cutters for mechanical coal miners
PL247250A1
(en )
1985-10-22
Method of manufacturing mining tools in particular cutters for mechanical coal miners
PL248255A3
(en )
1985-12-17
Method of manufacturing mining tools in particular cutters for mechanical coal miners
PL248256A3
(en )
1985-12-17
Method of manufacturing mining tools in particular cutters for mechanical coal miners
HUT37969A
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1986-03-28
Method and apparatus for mining steep mineral bed, particularly steep coal one
PL256988A1
(en )
1986-10-07
Planer for underground mining
PL254907A3
(en )
1987-02-23
Method of regenerating rotary cutting tools of mechanical coal miners
PL248056A2
(en )
1985-04-09
Method of filling mined out workings in mines
PL247372A1
(en )
1985-11-05
Shaped carbide tip for mining tool bits in particular those of mechanical coal miner cutters
PL256991A1
(en )
1986-10-07
Planer for underground mining
PL256989A1
(en )
1986-10-07
Planer for underground mining
PL256673A1
(en )
1987-08-10
Method of manufacturing mining tools
PL247539A1
(en )
1985-12-17
Method of mining coal in a longwall system
PL251804A1
(en )
1985-11-05
Method of improving rock oil mining efficiency
PL250572A1
(en )
1986-06-03
Coal planer cutting tool
ZA847329B
(en )
1985-04-24
Rock breaking tool
PL249615A1
(en )
1986-03-25
Cutting blade for mechanical coal miners
PL247251A1
(en )
1985-10-22
Mechanical coal miner cutter blade forging
GB8411083D0
(en )
1984-06-06
Boring type coal/mineral cutting machine
PL251151A1
(en )
1986-07-01
Mechanical coal miner for mining longwalls
BG37884A1
(en )
1985-09-16
Method for improving exploitation characteristics of diamond tools