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University of Geosciences
  Changjiang Diamond Bits Co. of China University of Geosciences is one of
the first university industries which invert the achievements of scientific 
researches into productivity. It was established in 1984 and now is producing
various specifications of PDC petroleum bits, diamond petroleum bits, 
polycrystalline petroleum bits, diamond geologic bits and thin-wall diamond
engineering bits by low-temperature electroplating, the most advanced 
technique in the world,  more>>
  • WH461-4

    4 Straight blades, polished cutters  decrease shearing Stress, prom- oting condition of cuttings  immigration,and increasing ROP.更多>>
  • WH461P-4

    4 Straight blades, polished cutters  decrease shearing Stress, prom- oting condition of cuttings  immigration,and increasing ROP.更多>>
  • WH461-5

    5 Straight blades, polished cutters  decrease shearing Stress, prom- oting condition of cuttings  immigration,and increasing ROP.更多>>
  • WH461P-5

    5 Straight blades, polished cutters  decrease shearing Stress, prom- oting condition of cuttings  immigration,and increasing ROP.更多>>
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