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Henan Jinzen Rock Drilling Tools Company
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Drill Tool 32mm 34mm 36mm 38mm 43mm 46mm 60mm Tungsten Carbide Tipped Hard Rock

Henan Jinzen Rock Drilling Tools Company
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Drill Tool 32mm 34mm 36mm 38mm 43mm 46mm 60mm Tungsten Carbide Tipped Hard Rock

Drill Tool 32mm 34mm 36mm 38mm 43mm 46mm 60mm Tungsten Carbide Tipped Hard Rock

tapered drill bits consist of mining and tunneling two series, with higher drilling efficiency, longer service life, better powder-discharge, better wear-resistance and impact-resistance, easier bit...

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