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src531 reverse circulation bits
Selling leads
...ugh for the casing tube to slide down behind the drill bit assembly. 2. When the required depth is reached, rotation is reversed carefully, ...
2024-12-09 12:11:48
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... assembly including pilot bit, reamer and guide device When drilling begins, the ODEX reamer swings out and drills a hole wide enough for the ...
2024-12-09 12:46:28
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