R38 76mm Thread Button Drill Bit Flat Face Drill Bit สําหรับการเจาะหิน

Video Description:
Discover the R32 Threaded Drill Rod Top Extension, designed for mining and tunneling operations. These high-strength steel rods feature threaded connections for easy assembly, ensuring efficient drilling into rock and soil. Perfect for professionals in mining, construction, and geotechnical engineering.
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