83/4"HS642XA API And ISO Steel Body PDC Drill Bit For Oil Well Drilling
PDC DRILL BIT,STEEL BODY DRILL BIT,6 BLADE DRILL BIT,MEDIUM SOFT DRILL BIT,OIL WELL DRILL BIT,
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H-ВОВ-матрица размера M 19 9-РЕЗЕЦ 4-4 лезвия 2-префектура уровне иерархической X-одной строки G-PDC РЕЗЕЦ сделал в Китае |
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