pre hardened drill rod - 1 views
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taiye2020 on 28 Apr 20Our drill pipe supplier is also the sole material supplier of Atlas Copco (Zhangjiakou Company) . At present, we can produce all kinds of drill pipes covering the fields of mining, vertical drilling, non-excavation and anchoring, Drilling tool products. Drill rod and casing specifications range from φ50 to φ273.