US2991103A
(en )
1961-07-04
Connecting structure for beams of a roof support or the like
DE2158160C3
(en )
1973-11-15
Cap construction for a pit support element
DE387581C
(en )
1924-01-05
Device for intercepting the auxiliary timber during excavation work in the mine
DE2319930C2
(en )
1981-09-17
Pre-pledging device with swiveling pre-pledging cap and swivel cylinder
DE843383C
(en )
1952-07-07
Security and auxiliary devices for the mining of coal or the like.
DE815956C
(en )
1951-10-08
Device to facilitate the introduction of parts of an iron mine support
DE826907C
(en )
1952-01-07
Device to facilitate the introduction of couplable steel caps in longwall mining
DE843382C
(en )
1952-07-07
Security and auxiliary devices for the mining of coal or the like.
DE815959C
(en )
1951-10-08
Device for stepless changing of the distance between a support lever and a support surface, in particular for pre-paving in longwall mining
DE845185C
(en )
1952-07-28
Beam for longwall construction
DE803535C
(en )
1951-04-05
Method and device for free pre-paving in moving longwall mining with shell iron
DE1068649B
(en )
1959-11-12
DE813691C
(en )
1951-09-17
Extension beams, such as shell irons or the like for longwall mining
DE801273C
(en )
1950-12-28
Process for the steadily progressing expansion of cavities underground, in particular longwall construction with undergrowths arranged parallel to the joint
DE833934C
(en )
1952-03-13
Procedure for longwall construction with full offset and device for its implementation
DE874885C
(en )
1953-04-27
Procedure for pre-piling in iron longwall construction
DE805634C
(en )
1951-05-25
Wandering pit support
DE1052936B
(en )
1959-03-19
Multi-part, articulated device for pre-joining caps when lining a pit
DE1025815B
(en )
1958-03-13
Vorpfaendegeraet
DE1155744B
(en )
1963-10-17
Auxiliary device for pre-joining caps
DE1278977B
(en )
1968-10-03
Cap installation aid
BE504095A
(en )
BE488832A
(en )
DE1361448U
(en )
1900-01-01
DE1257080B
(en )
1967-12-28
Cap installation aid