GB2258878B
(en )
1995-04-26
Mine roof support system
GB2260558B
(en )
1995-10-04
Mine roof supports
GB2214963B
(en )
1992-05-06
Mine roof supports
PL53496Y1
(en )
1995-10-31
SELF-ADVANCING mine ROOF SUPPORTS
PL289443A1
(en )
1991-09-09
Self-advancing longwall roof supports
PL53197Y1
(en )
1995-07-31
Self-advancing longwall roof supports
GB9014178D0
(en )
1990-08-15
Mine roof supports
ZA933156B
(en )
1993-12-07
Mine prop
PL295738A1
(en )
1994-03-07
Self-advancing longwall roof supports
PL297435A1
(en )
1993-08-09
Yieldable mine roof supports
PL292437A1
(en )
1993-05-31
Self-advancing roof supports
PL295066A1
(en )
1994-01-10
Self-advancing roof supports
PL53803Y1
(en )
1996-01-31
Self-advancing roof supports
PL297115A1
(en )
1994-06-27
Mine roof support
GB2243394B
(en )
1993-11-10
Mine roof supports
PL289662A1
(en )
1992-10-05
Mine roof supports of prop type
PL284433A1
(en )
1991-09-23
Self-advancing roof supports
PL284303A1
(en )
1991-09-23
Lemniscate-type self-advancing roof supports
PL287425A1
(en )
1992-04-21
Self-advancing roof supports
PL288068A1
(en )
1991-06-03
Self-advancing roof supports
PL52904Y1
(en )
1995-02-28
Self-advancing roof supports
ZA925256B
(en )
1993-04-28
Mine prop
PL298461A1
(en )
1993-11-02
Lemniscate type self-advancing roof supports
PL302601A1
(en )
1995-03-20
Lemniscate type self-advancing roof supports
PL273731A3
(en )
1990-01-22
Self-advancing roof supports