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Roof bolt with plastic sleeve and mechanical anchor

E - Fixed Constructions – 21 – D
Patent

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Roof bolter and process

E - Fixed Constructions – 21 – D
Patent

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Roof bolts for use in mines, a method for their production...

E - Fixed Constructions – 21 – D
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Roof bolts for use in mines, a method for their production...

E - Fixed Constructions – 21 – D
Patent

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Roof drill bit

E - Fixed Constructions – 21 – B
Patent

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Roof drill bit with hexagonal body portion

E - Fixed Constructions – 21 – B
Patent

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Roof support frame

E - Fixed Constructions – 21 – D
Patent

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Roof support of underground mines and openings

E - Fixed Constructions – 21 – D
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Roof support of underground mines and openings

E - Fixed Constructions – 21 – D
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Roof support pin

E - Fixed Constructions – 21 – D
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Roof support system for a mine and the method and tooling...

E - Fixed Constructions – 21 – D
Patent

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Roof supports

E - Fixed Constructions – 21 – D
Patent

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Roof truss sling

E - Fixed Constructions – 21 – D
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Rotary and longitudinal shock absorber for drilling

E - Fixed Constructions – 21 – B
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Rotary bit

E - Fixed Constructions – 21 – B
Patent

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Rotary bit

E - Fixed Constructions – 21 – B
Patent

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Rotary bit bearing system

E - Fixed Constructions – 21 – B
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Rotary bit with jet nozzles

E - Fixed Constructions – 21 – B
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Rotary blasthole drilling rig flexible jaw pipe positioner

E - Fixed Constructions – 21 – B
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Rotary blowout preventer

E - Fixed Constructions – 21 – B
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