Hand Held Rotatory Drills

chinacoal05 www.chinacoalintl.com m.chinacoalintl.com we provide service of enterprise's customs declaration, inspection. Product Introduction Dry coal drill is a hand-held drill used in the soft coal layer and soft rock layer,with mine explosion-proof structure water injection device, can be safely used for mine where methane and coal dust explosion. Operating Principle 1. Appearance check: Before operation, check all parts of fastening pieces whether they are loose or fall