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GB759241A
|
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Improvements in tamping machines
|
|
GB739453A
|
|
Improvements in percussion tools having a reciprocable hammer piston actuated by combustion gases
|
|
GB732002A
|
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Apparatus and method for use in driving raises
|
|
GB721261A
|
|
Drill steel for making drill holes in rock or ore
|
|
GB723283A
|
|
Improvements in or relating to pipe or like couplings
|
|
GB717623A
|
|
Hammer piston for percussion apparatus and percussion apparatus provided therewith
|
|
GB721610A
|
|
Improvements in hammer rock drills and hammer pistons for such drills
|
|
GB707693A
|
|
Improvements in loaders
|
|
GB714871A
|
|
Improvements in hammer pistons and tools provided therewith
|
|
GB717518A
|
|
Improvements in hammer pistons and tools provided therewith
|
|
US2747610A
|
|
Controlling devices for rock drill feeding mechanisms
|
|
GB702293A
|
|
Improvements in rock drill grinders
|
|
GB700333A
|
|
Improvements in drill wagons for use in tunnelling
|
|
DE848936C
|
|
Device for clamping or carrying rock drill bits
|
|
GB709943A
|
|
Improvements in apparatus for rigging or supporting rock drills
|
|
GB707169A
|
|
Improvements in drill rigs or drill supporting apparatus
|
|
GB678711A
|
|
Improvements in milling tools
|
|
US2707978A
|
|
Bark-cutting machine having yieldable and interconnected supports
|
|
GB677806A
|
|
Improvements in means for holding together parts of machinery and joints including such means
|
|
GB710486A
|
|
Improvements in feeding mechanisms for rock drills
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