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34mm 4 7 11 And12degree Rock Drilling Tapered Chisel Bit Tungsten Carbide

34mm 4 7 11 And12degree Rock Drilling Tapered Chisel Bit Tungsten Carbide
(1)Taper angle: 4° , 4° 46, 6° , 7° , 11° , 12° (2)Models: Chisel/cross/button bit (3)Diameter: 20-45 mm (4)Button bit...

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