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冲击钻井

4 bytes removed, 11:37, 23 September 2015
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====供应商====
* [https://en.eijkelkamp.com/ Eijkelkamp Agrisearch EquipmentAgrisearch设备] - Drilling equipment and manuals on hand auger and percussion gouges.
* [http://www.vrm.nl/ Van Reekum Materials] - Drilling equipment, hand auger and percussion drilling.
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