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Nq Bq Hq Pq Drill Rod for Core Drilling China Suppliers
2025-04-13
introduction 3040
HQ
API
3m 1.5m
Coal Mining
High Manganese Steel
Dcdma, Cdda, BS, ISO, Xjy850, 30crmnsia.
Xingtan
by Sea
NQ BQ HQ PQ
China
84314320
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