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Impregnated Diamond Core Bit Nq Hq Pq
2025-04-13
introduction 4910
BQ NQ HQ PQ NQ2 NQ3 HQ3
Bq Nq Hq Pq Nq2 Nq3 Hq3 Pq3
Core Drill Bit
Diamond
Deep Hole Hard Rock Core Drilling
JINSHI
Carton
BQ NQ HQ PQ NQ2 NQ3 HQ3 PQ3
China
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