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diamond pdc roof bolt drill bit

PDC 3 Wings Half Tips Bit, Buy Roof Support Bolting Drill Bit
Long Service Life/High Wear Resistance/High Impact Resistance PDC Anchor Shan...
Coal Mining Diamond PDC Roof Bolt Drill Bit Mainly Used In The Industries ,W...

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No 66, Changming Road, Xi'an, Shaanxi Province, China
+86-029-82612068
+8615291688126
zuanlongbits@gmail.com
http://m.zuanlongbits.com/

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