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PDC Pillar Drill Bit, Gear Drill Bit For Hard Rock |
| Create: 12/28/2016 |
| Expired Date: | 12/28/2018 |
| Category: | Equipment&Machinery |
| Message: | Application Zuanlong PDC Pillar Drill Bit has been wildly used to coring-drilling for geological exploratory of coal measure stratum. The normal type is suitable for the f |
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| City: | Xian[CN]
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| Location: |
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