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The product description:   Diamond composite sheet (PDC) is under the condition of high temperature,Website:http://www.qianruidrill.com, the artificial diamond and hard alloy prepared special super hard material, it not only has the advantages of high hardness, wear resistance of diamond hard alloy, but also have a strong impact resistance, a large blade, it can greatly improve the blade bit’s working efficiency, is ideal for drilling in medium hard rock and hard rock; the main categories of diamond composite piece drill bit manufactured by our company are diamond, diamond drill bit bolt conca