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GB1086364A
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Hydraulically-operated mine prop
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GB1069282A
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Apparatus for the closing of air shafts or emergency exits of shelters, particularly underground shelters
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GB1061612A
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Pressure relief or unloading valve
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GB1004110A
|
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Self-advancing support structure for a mine gallery roof
|
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GB900890A
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Improvements in supporting pillars, especially for use in supporting a roof in mine workings and the like
|
|
GB927358A
|
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Clamping sleeves for mine gallery support sections
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GB929546A
|
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Improvements relating to mine gallery supports
|
|
GB925353A
|
|
A new or improved trough-shaped mine support section
|
|
GB934486A
|
|
Mine roof support
|
|
GB893050A
|
|
Improvements in or relating to hydraulic pit props
|
|
GB872871A
|
|
Hydraulic pit prop
|
|
GB821671A
|
|
Improvements in mine roof supports and the like
|
|
GB819211A
|
|
Improvements in linings for mine galleries
|
|
GB809603A
|
|
Yielding coupling for inter-nesting profile irons of channel section, for example in mining structures
|
|
GB818343A
|
|
Improvements in or relating to girder structures for mines
|
|
GB776852A
|
|
Improvements in sliding arch connections
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|
GB775945A
|
|
Improvements in or relating to telescopic pit props
|
|
GB804100A
|
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Connection for sliding arch linings for mines and the like
|
|
GB792370A
|
|
Process and apparatus for the production of tempered structural steel sections
|
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GB797355A
|
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Improvements in or relating to mine roof or like supporting structures
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