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US3395542A
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Propping frame for mining galleries
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DE1212924B
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Extension frame for mine sections
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GB851682A
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A cross-bar for the slidable assembly of associated members of roof supports
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GB857744A
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Rolled members of channel or trough section particularly for the construction of mine frames
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FR1224250A
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Spacer for sliding assembly of retaining frames
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ES241648A3
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Assembly device for mine frames (Machine-translation by Google Translate, not legally binding)
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GB877417A
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Improvements in or relating to mine roof support frames
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FR1188123A
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Rigid sliding support frame with separable elements
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GB785743A
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Improvements in or relating to mine roof supports
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FR68391E
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Improvement in assembly parts for mine frames
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FR68091E
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Improvement in assembly parts for mine frames
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FR1105306A
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Profiles for mine support and the like
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FR1061364A
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Device for controlling the opening and closing of extraction skips or buckets
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FR59900E
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Mine coal lane chair
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FR985998A
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Mine coal lane chair
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