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US3089310A
(en)
|
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Trench shoring machine
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|
US4029361A
(en)
|
|
Longwall mining roof support for double deck machines
|
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PL60677B1
(OSRAM)
|
|
|
|
PL75035B1
(en)
|
|
Sealing and position rectifying mechanism[au3964972a]
|
|
US3964265A
(en)
|
|
Method and apparatus for mining and supporting the mine roof
|
|
FR2559206A1
(fr)
|
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Machine a bouclier, outil de forage et dispositif d'evacuation de delais pour le creusement de tunnels et galeries
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CA2160987A1
(en)
|
|
Drilling arrangement and drilling feed mechanism
|
|
GB1245860A
(en)
|
|
Dismantlable storage tank
|
|
PL61340B1
(OSRAM)
|
|
|
|
US4240666A
(en)
|
|
Device for mining of thick strata of useful minerals
|
|
CS226710B2
(en)
|
|
Hydraulic control circuitry of one-sided aligning gap cover
|
|
US4064701A
(en)
|
|
Hydraulic shield assembly
|
|
GB735294A
(en)
|
|
Improvements relating to fluid-operated roof-supporting units for use in mines and like places
|
|
US4293248A
(en)
|
|
Walking roof support
|
|
DE1091061B
(de)
|
|
Wandernder Stuetzrahmen zum Ausbau unterirdischer Grubenraeume
|
|
PL65115B1
(OSRAM)
|
|
|
|
US4586851A
(en)
|
|
Levelling ram for roof-shield mine support systems
|
|
PL84141B1
(OSRAM)
|
|
|
|
SU1344913A1
(ru)
|
|
Агрегат фронтального действи
|
|
GB1072893A
(en)
|
|
Apparatus for shoring up mining galleries
|
|
SU1151683A1
(ru)
|
|
Гидравлическа стойка с внешней системой питани
|
|
GB847934A
(en)
|
|
Improvements in gallery-supporting systems for underground working
|
|
GB1082257A
(en)
|
|
Bracing device particularly suitable for use at the end of a face conveyor at a coal face where a coal plough is employed
|
|
SU1154479A1
(ru)
|
|
Секци шахтной механизированной крепи
|
|
GB1100140A
(en)
|
|
An advancing roof support assembly for mines
|