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2021
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How is the taper drill rod produced?
How is the taper drill rod produced?
Material screening
Material detection
Inspection of overall dimension and inner hole
Inspection of overall dimension and inner hole
Water needle hole processing
Water needle hole processing
Impact end machining
Impact end machining
Collar processing
Collar processing
Collar processing
Inspection for extrusion quality of collar plate pier
Drill slightly cone machining
Impact end heat treatment of common finished brazing rod
Ordinary finished brazing heat treatment
High strength finished brazing heat treatment
Heat treatment quality inspection
Straightening
shot blasting
Anti-corrosion painting
Packaging
Packaging
Lianhuashan drilling tools 50 years of history of China's drilling enterprises
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