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Aug 14, 2020 · since its beginning in 1985, numa has become a major manufacturer of dth hammers and bits for the domestic and international drilling industry. the company designs and builds downhole hammers and bits for drilling vertical and horizontal holes 3½ to 50½ inches (89 to 1,283 millimeters) in diameter. to learn more, visit www.numahammers.

Down the hole hammers dth hammers for well and blast hole drilling. water well drilling hammer.

Dth hammer, down the hole hammer, rock drilling hammer manufacturer / supplier in china, offering hjg water well drilling 6 inch dth hammer, cemented carbide for mining, crawler hydraulic well-geothermal drilling rig hjg-w828a and so on.

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