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Bq Nq Hq Pq Hrq Surface Set Diamond Core Bits
2025-04-13
introduction 2750
BQ NQ HQ PQ HRQ
Core Drill
Metal Drilling
Dcdma
Customized
Global
Customized
Top
crown
Cartons
Wireline Series, Metric standard, DCDMA, CDDA
China
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