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Sinodrills Step Drag Bit
Step drag bit: three wings step drag bit, four wings step drag bit;
Drag bits diameter: 76mm to 445mm;
Drag bits thread sizes: 2 3/8" API Reg, 3 1/2" API Reg, 4 1/2" API Reg, 6 5/8" API Reg, etc
Step Drag Bit
Guizhou Sinodrills Equipment Co.,Ltd.
rock drilling tools
