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Changsha Chaojingang Machinery Manufacturing Co., Ltd.

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City:changsha

Country/Region:china

Contact Person:MrWilson Chen

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ISO 9001 2000 Certified Drill Extension Rod for DTH Drilling

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Drill extension rod Drill Pipe DTH drill Advantages: 1. High quality raw material, with premium hardened procedures for long life. 2. Full production ...

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