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Borrverktyg.
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Stabilizer for single or dual tube drilling
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Method of rock drilling and apparatus for use therein
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Drill bit
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取心和无心钻进不提钻转换钻具
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(fi)
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Poratanko
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Drilling equipment
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(cs)
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Drilling apparatus
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Fluid circulating drilling barrel
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一种中空螺杆钻具总成
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(ja)
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衝撃機械装置
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Method and apparatus for controlling dust in a rotary drilling operation
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Apparatus for preventing dust penetration through an annular gap between the arm and head of cutting machine inside the cutting head
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Roller bit
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Hammer rock drill
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一种湿式打眼机具
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(en)
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Swivel chamber for water actuated wireline drills
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(fi)
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Menetelmä reiän poraamiseksi ja sovitelma menetelmän toteuttamiseksi
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PL177283B1
(pl)
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Sposób i urządzenie do wymiany przewodów podziemnych, zwłaszcza kanalizacyjnych przewodów rurowych
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(sv)
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Bladberande ram till maskiner for sagning av marmor, granit och hard sten
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RU2182640C1
(ru)
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Шарошечное долото
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(en)
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Apparatus for drilling well casings
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Устройство дл ударно-вращательного бурени скважин
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钻杆套洗装置
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