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GB1249412A
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Improvements in or relating to mine roof supports
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US3601998A
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Control of mine roof support assemblies
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GB1192150A
|
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Improvements in or relating to Valves
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GB1204812A
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Improvements in or relating to telescopic hydraulic mine roof chocks
|
|
GB1217566A
|
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Improvements in or relating to self-advancing underground roof supports
|
|
GB1213019A
|
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Improvements in or relating to underground roof support systems
|
|
GB1182817A
|
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Fluid-Operable Self-Advancing Mine Roof Support.
|
|
US3431737A
|
|
Hydraulic roof supports
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GB1184437A
|
|
Improvements in Fluid-Operable Mine Roof Supports
|
|
GB1186179A
|
|
Mine Roof Support Unit.
|
|
GB1202532A
|
|
Fluid operable control assembly for mine roof supports.
|
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GB1202531A
|
|
Control of mine roof supports
|
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US3408820A
|
|
Mine support with resilient release means
|
|
GB1178119A
|
|
Temporary Extensible Cantilever for Mine Roof Supports
|
|
GB1179233A
|
|
Improvements in or relating to Fluid Operated Roof Supports.
|
|
GB1116892A
|
|
Two-tier storage apparatus
|
|
GB1122309A
|
|
Improvements in advancing mine roof supports
|
|
GB1159961A
|
|
Improvements in Hydraulic Roof Supports for use in Mines
|
|
GB1089968A
|
|
Improvements in or relating to anchor stations for coal mine conveyors
|
|
GB1088796A
|
|
Means for effecting correct alignment of mine roof support units
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