상위 망치 바위 드릴 H22 광산 터널링을위한 7도 톱 톱 톱 톱 톱 스탠크 헥스 22*108mm

Video Description:
Discover the Top Hammer Rock Drill H22 7 Degree Taper Drill Rod, designed for mining tunneling and construction. Made from hexagonal hollow alloy steel, this drill rod ensures durability and precision in tough environments. Perfect for mine tunnel support, rock drilling, and bridge excavation.