It is for drilling coal, water or geological exploration application. The size has 55mm, 65mm, 75mm, 94mm, 113mm, 133mm, 153mm, 171mm, 190mm, 220mm, etc. The pdc body can be steel or matrix. It not only save a lot for your drilling budget, but also...
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tricone bit, pdc bit, hole opener, drag bit, drilling equipment...
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