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US3089310A
(en)
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Trench shoring machine
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US4029361A
(en)
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Longwall mining roof support for double deck machines
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PL60677B1
(cs)
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|
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PL75035B1
(en)
|
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Sealing and position rectifying mechanism[au3964972a]
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US3964265A
(en)
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Method and apparatus for mining and supporting the mine roof
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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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CS229507B1
(en)
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Support unit for coal or industrial minerals seam mining in benches and/or by roof enlarging
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CA2160987A1
(en)
|
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Drilling arrangement and drilling feed mechanism
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GB1245860A
(en)
|
|
Dismantlable storage tank
|
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PL61340B1
(cs)
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|
|
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US4240666A
(en)
|
|
Device for mining of thick strata of useful minerals
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US4064701A
(en)
|
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Hydraulic shield assembly
|
|
GB735294A
(en)
|
|
Improvements relating to fluid-operated roof-supporting units for use in mines and like places
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US736308A
(en)
|
|
Method of freezing the ground.
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US4293248A
(en)
|
|
Walking roof support
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|
DE1091061B
(de)
|
|
Wandernder Stuetzrahmen zum Ausbau unterirdischer Grubenraeume
|
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PL65115B1
(cs)
|
|
|
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US4586851A
(en)
|
|
Levelling ram for roof-shield mine support systems
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PL84141B1
(cs)
|
|
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SU1344913A1
(ru)
|
|
Агрегат фронтального действи
|
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GB1072893A
(en)
|
|
Apparatus for shoring up mining galleries
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|
SU1151683A1
(ru)
|
|
Гидравлическа стойка с внешней системой питани
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GB847934A
(en)
|
|
Improvements in gallery-supporting systems for underground working
|
|
SU1154479A1
(ru)
|
|
Секци шахтной механизированной крепи
|
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GB1100140A
(en)
|
|
An advancing roof support assembly for mines
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