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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
(enExample)
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PL75035B1
(en)
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Sealing and position rectifying mechanism[au3964972a]
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CA2160987A1
(en)
|
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Drilling arrangement and drilling feed mechanism
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GB2115046A
(en)
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Self-advancing roof supports
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GB1245860A
(en)
|
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Dismantlable storage tank
|
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PL61340B1
(enExample)
|
|
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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
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GB2080380A
(en)
|
|
Mine Roof Supports
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|
GB735294A
(en)
|
|
Improvements relating to fluid-operated roof-supporting units for use in mines and like places
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|
DE1091061B
(de)
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Wandernder Stuetzrahmen zum Ausbau unterirdischer Grubenraeume
|
|
PL65115B1
(enExample)
|
|
|
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US4586851A
(en)
|
|
Levelling ram for roof-shield mine support systems
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PL84141B1
(enExample)
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|
|
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SU1344913A1
(ru)
|
|
Агрегат фронтального действи
|
|
GB1072893A
(en)
|
|
Apparatus for shoring up mining galleries
|
|
GB847934A
(en)
|
|
Improvements in gallery-supporting systems for underground working
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FI58676C
(fi)
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|
Borrningsstoed
|
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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
|
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SU1154479A1
(ru)
|
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Секци шахтной механизированной крепи
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PL63334Y1
(pl)
|
|
Belka ukladu przesuwnego górniczej obudowy zmechanizowanej PL PL
|
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GB980581A
(en)
|
|
Improvements in hydraulic roof supports or chocks for mines
|
|
FR2358541A1
(fr)
|
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Installation pour le demontage d'un appareillage d'evacuation dans une taille inclinee
|