Customized Tungsten Carbide Thread Drill Bits ...
1. Product name: Tungsten Carbide Thread Drill Bits. Type cone chisel bit, tapered cross drill bit, tapered button drill. 2. Uses: Conical bits are used for drilling granite, marble quarries, gold mines, railways, tunnels, etc. 3. Features: the taper drill is connected to the taper steel drilling hole of the rock drill. 4.
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