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Development of GCF Series of Reverse Circulation Construction Percussive Drill Rig
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P634.3+1

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    Abstract:

    This paper describes the development generals of GCF series of reverse circulation percussive drill rigs and their main technical specifications, features and production tests.

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History
  • Received:
  • Revised:March 09,2001
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  • Published: September 25,2001
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