Anchor Drill Rods Rock Drilling Tools Bq Nq Hq Pq
2020-3-17 · Drilling Rod For Anchor and Water Well. Drill rod adopts friction welding technology,joints by forging processing technology, and quenching and tempering, tube selection according to API standard, both ends of the internal thickening process and quenching and tempering, with thick and thin tube wall thickness of two pipes, heat treated steel grade reaches S135, strong impact resistance, fully ...
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