Best High Quality Taper Drill Bits Supplier | Betopper ...
Tapered drill bits are used in granite and marble quarry, gold mine, railway, tunnel, etc. To ensure the normal service life, taper drill bits need to be matched well with taper drill rods, the taper degree must be the same between taper drill bits and taper dill rods. Carbide: Button bit, Cross bit, Chisel bit
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