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how to grind the diamond finishing drill bout (how to grind the drill "

Summary: 在孕镶钻头打滑不进尺,表镶金刚石钻头仅仅进尺 0 4米至0 5米的打滑地层,使用本实用新型可以打10米以上 图1为本实用新型实施...

in the macrodynamite, the diamond drill is only the sliding formation of 0 4 meters to 0 meters, and the present invention can be hit by 10 meters, and fig. 1 is the present invention.