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central africa 17 1/2 inches matrix body pdc bits with 19mm cutters and 5 blades for medium soft formations
central africa IADC437, tricone bits with TCI tooth for extremely soft formations with low compressive strength and high drillability
central africa IADC517, tricone bits with TCI tooth for extremely soft formations with low compressive strength and high drill ability
central africa IADC532, mining tricone bits with TCI tooth for Soft formations with low compressive strength and high drill ability
central africa IADC537, tricone bits with TCI tooth for soft to medium hard formations
central africa IADC617, tricone bits with TCI tooth for medium-hard formation with high compressive strength