41mm Diameter R25 Down The Hole Thread Threaded Button Drill Bit For Mining Quarrying

Quality Thread Button Bits from China.
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Wuhan Kingdrilling Diamond Co.,Ltd quality manufacturer from China.
We can supply:
DTH Drill Bit : https://www.mingdthbit.com/supplier-d...
DTH Button Bits : https://www.mingdthbit.com/supplier-d...
Casing Drilling Bit : https://www.mingdthbit.com/supplier-c...
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