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.... Since the piston is in direct contact with the drill , little energy is lost. This gives DTH drilling a nearly constant penetration rate regar...

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...: Taper Degree: 6°, 7°, 11°, 12° Diameter: 30mm, 32mm, 33mm, 34mm, 36mm, 38mm, 40mm, 41mm, 42mm Buttons: 4, 5, 6, 7, 8 Flushing Water Hole Nos....

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Hand Held G10 Pneumatic Rock Drilling Machine Air Pick Breaker 1. Coal mining in coal mine, digging pillar foot pit and opening dit...

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... rocks. This is because a lot of mining operations also use rock crushers, but some rocks are too large to fit. So, breaking them up makes the proc...

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