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Email: zuanlongbits@gmail.com

Tel: +86-029-82612068

Fax: +86-029-82612068

Address:No 66, Changming Road, Xi'an, Shaanxi Province, China

China PDC Roof Bolt 25-42mm Coal Mine Drill Bit Manufacturer

1. The wings are higher wear resistance and impact toughness. 2. To repeat repair and grind are not necessary. 3. Long life drill. 4. Drilling efficiency could be promoted sharply in penetration of high –medium hard rock formation and labor intensity could be reduced.

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