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Professional Manufacturer Nq, Hq, Phd Drill Pipe Drill Rod
2025-04-13
introduction 3560
BQ, NQ, HQ, PQ/PHD
Dcdma
1-6m
Coal Mining, Core Drilling
High Manganese Steel
High Precision
Long Life
Mining Exploration
CROWN
Bundles
AW, BW, NW, AWJ, BWJ, NWJ
China
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