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JPS57151489U |
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JPS5742796B2 |
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JPS57137693U |
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JPS5736715Y2 |
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JPS57114888U |
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JPS57110191U |
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JPS57105389U |
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JPS57105180U |
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JPS57105181U |
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JPS57105182U |
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JPS5796779U |
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JPS5796286U |
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JPS5726957Y2 |
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JPS5726958Y2 |
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JPS5726959Y2 |
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JPS5725715B2 |
A rock drill having a hydraulic system for controlling a striking, rotating and advancing movements of a drilling rod. The advancing or forward feeding conduit for a feed actuator is provided with a relief valve which is responsive to th...
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JPS5725716B2 |
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JPS5725719B2 |
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JPS5785490A |
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JPS5723595Y2 |
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JPS5723594Y2 |
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JPS5723596Y2 |
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JPS5775086U |
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JPS5720711Y2 |
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JPS5720713Y2 |
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JPS5720712Y2 |
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JPS57500742A |
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JPS5719259Y2 |
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JPS5716705Y2 |
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JPS5716699Y2 |
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JPS5715276B2 |
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JPS5712839B2 |
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JPS5712075Y2 |
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JPS5712076Y2 |
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JPS5711743Y2 |
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JPS5729787A |
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JPS5728890U |
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JPS576637Y2 |
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JPS576639Y2 |
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JPS56176186U |
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JPS56163192U |
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JPS5649715B2 |
1382022 Percussive tools ATLAS COPCO AB 20 June 1973 [30 June 1972] 29187/73 Heading B4C A hammer piston 3 of a rock drill is driven towards a tool 5 by a gas cushion in the working chamber 4 of a driving piston 2 and gas is transferred ...
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JPS56150291A |
Rock drilling apparatus including a pressure fluid driven rock drilling machine (10) and a drill unit (11). Said unit (11) including a drill rod (18), a drill bit (16) and a tube (20) surrounding said drill rod (18). Said drill rod (18) ...
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JPS56154494U |
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JPS56154495U |
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JPS56501638A |
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JPS5646958B2 |
A hydraulic percussion or an impact apparatus for driving rock-breaking tools, drill bits and ramming or tamping tools comprises a body in which an end of the tool is received and a reciprocating mass formed as a piston which is axially ...
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JPS56134991U |
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JPS56132082U |
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JPS5640952Y2 |
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