A high-speed drilling bit
Li Xiaohuan Li Zhongyong Patents and innovation Zou Chao
Diamond Drill Bit Grinding Device for Water Injection Channels
Li Xiaohuan Li Zhongyong Patents and innovation Zou Chao
High-Strength pdc Drill Bit: Manufacturing Method
Li Xiaohuan Li Zhongyong Patents and innovation Zou Chao
Corrosion-Resistant, Wear-Resistant Geological Drill Bit & Manufacturing Method
Li Xiaohuan Li Zhongyong Patents and innovation Zou Chao
Composite Geological Drill Bit with Anti-Sand Blocking Features
Li Zhongyong Patents and innovation Zou Chao
New Cleaning Device for Geological Drill Bit Production
Li Xiaohuan Li Zhongyong Patents and innovation Zou Chao
Eco-Friendly Repair Device for Diamond Drill Bits
Li Xiaohuan Li Zhongyong Patents and innovation Zou Chao