TCI tricone rock bits: 1)certified by ISO9001&API 2))used for water well, oil field 3)IADC:114-117,127,437,517,617,637 TCI tricone rock bits: 1)certified by ISO9001&API2)Fast drilling rate3)Strong cutting structure durability4)be used for water well, oil field, underground, construction, geothermal, directional boring5)Be used to drill low compressive strength,soft formation6)various of model and ...
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