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GB766632A
|
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Improvements in or relating to roof support devices for roofs in underground mines
|
|
GB748868A
|
|
Improvements in or relating to roof supports for underground mines
|
|
GB717146A
|
|
Improvements in and relating to roof supports in mines
|
|
GB735103A
|
|
Improvements in or relating to releasable support means for roofs in underground mines
|
|
GB720537A
|
|
Improvements in or relating to releasable supports for roofs in underground mines
|
|
GB712236A
|
|
Improvements in or relating to chain cutter jibs used in mining
|
|
GB700096A
|
|
Improvements in and relating to cutter pick assemblies for mining machines
|
|
GB689767A
|
|
Improvements in or relating to mining machines
|
|
GB700087A
|
|
Improvements in and relating to cutters
|
|
GB700085A
|
|
Improvements in cutting machines for use in mines
|
|
GB684403A
|
|
Improvements in or relating to releasable supports for roofs in underground mines
|
|
GB689737A
|
|
Improvements in or relating to mining machines
|
|
GB677979A
|
|
Improvements in or relating to cutter deivces for coal or the like cutting machines
|
|
GB677886A
|
|
Improvements in or relating to cutter devices for coal or the like cutting machines
|
|
GB655633A
|
|
Improvements in or relating to a pick for cutting coal and the like in mining
|
|
GB623346A
|
|
Improvements in or relating to cutter devices for coal and the like cutting machines
|
|
GB614865A
|
|
Improvements in or relating to pick boxes for mining machines
|
|
GB606973A
|
|
Improvements in coal and like cutters
|
|
GB521611A
|
|
Improvements in chain coal cutting machines for use in mines
|
|
CA469792A
|
|
Mining machines
|
