zuanlongbits@gmail.com

+86-029-82612068

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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

Factory Direct Concave Type PDC Diamond Non Core Drill Bits For Hard Rock

Factory Direct Concave Type PDC Diamond Non Core Drill Bits For Hard Rock

The four wings normal type concave drill bits suits for f<=10, the reinforced type suites for f<=15

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