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src531 reverse circulation bits
Selling leads
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...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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