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Application: Inserting for rock cutter machines and core drill bits for geotechnical (mining,water well drilling) tunneling, quarrying,construction and machinery aspect.Working formation: Soft rocks and sea drilling with hardness 3-6 degrees, such as lime rock, marble, shale, etc, and in medium to hard rock with coarse grains formations
Popular size: 3x3x10xr1.5, 1.5x1.5x5, 3x3x3,4x4x4,6.3x3.3,
