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GB1077602A
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Improvements in or relating to stilts and like supports for roadways
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GB1060500A
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Improvements in or relating to yielding roof supports for mines
|
|
GB940448A
|
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Advancing mine-roof support system
|
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GB930986A
|
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Improvements in or relating to telescopic mine-roof supports
|
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GB946631A
|
|
Improvements in or relating to mine-roof supports
|
|
GB916066A
|
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Improvements in or relating to roof supports for mines
|
|
GB937578A
|
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Means for erecting mine roadway supports
|
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GB876949A
|
|
Improvements in or relating to means for setting supports for mines
|
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GB924372A
|
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Improvements in or relating to roof support elements for mines
|
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GB909226A
|
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Means for erecting mine roadway supports, especially circular supports
|
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GB912945A
|
|
Improvements in or relating to props, especially pit props
|
|
GB904522A
|
|
Improvements in or relating to roof supporting means for mines
|
|
GB900316A
|
|
Improvements in or relating to means for coupling articulated roof bars for mines
|
|
GB893964A
|
|
Improvements in or relating to props, especially pit props
|
|
GB886321A
|
|
Improvements in or relating to clamping devices for mine roof supports, particularlypit-props
|
|
GB890744A
|
|
Improvements in or relating to collapsable supporting elements for mines
|
|
GB884384A
|
|
Means for withdrawing roof-support elements in long-wall mine workings
|
|
GB882286A
|
|
Improvements in or relating to mine roof supports
|
|
GB834976A
|
|
Improvements in or relating to pit props and like support elements
|
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GB877121A
|
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Improvements in or relating to props, particularly pit props
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