welles step, welles step Suppliers and Manufacturers
KERUITE factory PDC cutter drag bit step type . US 1000-1500 Piece 1 Piece (Min. Order) 7 YRS . Cangzhou Creator Drill Equipment Sinence And Technology Co., Ltd. ... 9 7/8' 3 blades tungsten carbide step drag type drill bit for oil well. US 28.00-2500 Piece
Get Price