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Carl G.b. Ekwall

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Device for controlling the feeding force at rock-drilling

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Patent

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Device for transferring torque from a drill-sleeve to a...

F - Mech Eng,Light,Heat,Weapons – 16 – D
Patent

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Hydraulic impact device

B - Operations – Transporting – 25 – D
Patent

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Pneumatic impact motor with lubrication free piston head and...

F - Mech Eng,Light,Heat,Weapons – 01 – L
Patent

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Rock drilling apparatus

E - Fixed Constructions – 21 – B
Patent

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Profile ID: LFCA-PAI-P-183290

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