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coal mining miniature pneumatic drills

The maximum air consumption is 8 to 19 m 3 /s min. of free air at 6 kgf/cm 2 including air blowing for drill bit of 60-70 mm dia. Though a detachable X-bit is the drill bit on most of the wagon drills, some wagon drills used for 100 m dia. holes used down the hole hammers.

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