PL306053A1
(en )
1995-06-12
Air conditioning system for underground mine workings
PL301843A1
(en )
1994-07-25
Coal planer for underground mining
PL323324A1
(en )
1998-06-08
Short-wall mining machine for underground coal mines
PL310855A1
(en )
1997-04-14
System for conditioning air to mine faces in deep underground coal mines
PL335546A1
(en )
2000-03-27
Longwall mechanical coal miner guiding system
PL271020A1
(en )
1989-09-04
System for cooling air in underground mine workings
PL313430A1
(en )
1996-09-30
System for getting and mining minerals, especially coal, present in the form of a deposit
PL315477A1
(en )
1998-02-02
Driving unit in particular for a longwall coal miner
PL321399A1
(en )
1999-02-01
Central air conditioning system for deep underground mine workings
PL318786A1
(en )
1997-07-07
Underground electric narrow-gauge railway for mines
PL306745A1
(en )
1995-07-24
Underground mining planer
PL306602A1
(en )
1996-07-08
System for sorting the gotten especially in underground mine workings
PL101196U1
(en )
1996-03-18
Apparatus for demethansing mine workings in underground mines
GB2255948B
(en )
1994-04-06
Improvements in or relating to underground mining systems
PL328176A1
(en )
2000-02-28
Central air conditioning system in particular for remote workings of deep underground mines
PL317845A1
(en )
1997-07-21
Mining conveyor for an underground coal mine
PL316086A1
(en )
1996-12-23
Longwall coal miner
PL309075A1
(en )
1995-12-11
Flow carrying system arrangement for effecting demethanisation of coal mine working
PL303891A1
(en )
1995-12-27
Longwalll coal mining method
PL297464A1
(en )
1994-07-25
Method of depositing smoke-box dust in abandoned underground mine workings
PL284657A1
(en )
1991-10-07
Driving system for ventilation stoppings in mines
ZA967895B
(en )
1997-08-27
Method of operating transportation trains working in under-ground mines
PL305319A1
(en )
1996-04-15
System for automatically monitoring the migration of mine crew in underground mine workings
ZA956710B
(en )
1996-03-28
Warning system for an underground mine
PL310256A1
(en )
1997-03-03
Longwall mechanical coal miner