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Hydraulic control system for a rock drill

Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means
Patent

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Hydraulic control system for a rock drill

Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means
Patent

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Hydraulic device

Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means
Patent

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Hydraulic drill, in particular a rock drill

Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means
Patent

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Hydraulic drilling rig

Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means
Reexamination Certificate

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Hydraulic drilling rig

Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means
Patent

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Hydraulic drive tool controlling apparatus

Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means
Patent

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Hydraulic driven tool controlling apparatus

Tool driving or impacting – Automatic control of power operated means
Patent

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Hydraulic impact hammer with overpressure and...

Tool driving or impacting – Automatic control of power operated means – Drive means responsive to torque or speed condition
Reexamination Certificate

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Hydraulic operated rock drilling apparatus

Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means
Patent

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Hydraulic pile driver

Tool driving or impacting – Automatic control of power operated means
Patent

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Hydraulic pile driving apparatus and method

Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means
Patent

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Hydraulic rock drill

Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means
Patent

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Hydraulic rock drill system

Tool driving or impacting – Automatic control of power operated means
Patent

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Hydraulic rock drill with stroke responsive advance

Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means
Patent

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Hydraulic system for mining equipment and method of...

Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means
Reexamination Certificate

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Hydro-impulse screwing device

Tool driving or impacting – Automatic control of power operated means – Drive means responsive to torque or speed condition
Patent

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