ZA828105B
(en )
1983-09-28
Recovery of coal liquefaction catalysts
GB2031981B
(en )
1982-07-07
Shield-type mine roof support
DE3264629D1
(en )
1985-08-14
Apparatus for coupling signals to or from a two-wire line
GB8921330D0
(en )
1989-11-08
Apparatus for transfer of signals to or from a remote site
PL288483A1
(en )
1992-06-26
Apparatus for coupling a mining scraper conveyour to extreme units of self-advancing roof supports
GB2090896B
(en )
1984-08-15
Control apparatus for hydraulic prop of mine roof support
GB2272625B
(en )
1995-01-04
Improvements relating to slurry scraper systems
ZA793763B
(en )
1980-07-30
Shield-type mine roof support
PL240950A1
(en )
1984-09-10
Mine wagon for carrying mine equipment in particular components of self-advancing roof supports being removed from a longwall area
PL243755A1
(en )
1985-03-26
Hydraulic prop for self-advancing roof supports
PL285954A1
(en )
1992-01-13
Hydraulic system of a self-advancing roof support unit
PL293500A2
(en )
1992-08-10
Method of taking away the longwall self-advancing roof supports from a working to be abandoned and apparatus therefor
PL281344A1
(en )
1991-05-20
Apparatus for moving units of self-advancing roof supports
PL244569A1
(en )
1985-05-21
Longwall section of a roof support system
PL285022A1
(en )
1991-11-04
Hydraulic system for advancing cylinders of self-advancing roof supports
GB2136040B
(en )
1986-06-11
Pivotal linkage of a mine roof support
PL284920A1
(en )
1991-11-04
Advancing system for self-advancing roof supports
PL286864A1
(en )
1992-04-06
Double-arm longwall coal miner
PL288009A1
(en )
1992-06-01
Apparatus for coupling driving units to longwall haulage conveyors
PL234678A1
(en )
1983-07-18
Flexible connector for a walking mine roof support
PL287187A1
(en )
1992-04-06
Set of longwall mining equipment
PL289770A1
(en )
1992-10-05
Hydraulic system for shifting section of self-advancing roof supports
ZA867351B
(en )
1987-05-27
Coupling for a mine prop
PL284262A1
(en )
1991-09-23
Hydraulic prop for mine roof supports
PL243762A2
(en )
1984-07-30
Mechanized roof supports for mining coal deposits using a hydraulically carried filling material