Process for carrying out earthworks or stone work and hydraulic hammer mechanism
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Impact absorbing mechanism for deep hole hammer drill, has air hole provided for connecting cylinder chamber and channel, which is closed by piston on exertion of axial force
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Drilling device with tubular outer drill stem through which injection drill stem extends
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Hydro percussive jackhammer with pressure and return lines
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Hydraulic drill with flushing feed
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Hammer drill
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Drilling and / or injection device
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Hydraulic percussion hammer
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Fluid-operated impact hammer
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Fluid operated hammer
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Fluidbetaetigter hammer.
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Hydraulic hammer mechanism for drill
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Hydraulic impact device with pilot valve
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Restoration of leaky buried pipes
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Expansion device
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Mine percussion drill assembly - has striker transmitting blows to drill tool via rear end of liq. column
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Soil/rock drill assembly - with independent rotary and percussive drills
