81/2" HM952XAG berkualitas tinggi Pdc bor Bits.drill bit untuk Rock Daimond pengeboran
81/2" HM952XAG berkualitas tinggi Pdc bor Bits.drill bit untuk Rock Daimond pengeboran,Website:, campuran Cutter Pdc bor
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1,Suit for drilling medium to medium-hard formations.
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