A-type Hydraulic Erection Derrick for Directional Drilling
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P634.34

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    Abstract:

    A-type hydraulic erection derrick for directional drilling was developed to fit the XY Series Core Drilling Rigs and National Paten was authorized. The structure pattern, characteristics and use cases of the derrick were introduced.

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History
  • Received:November 09,2004
  • Revised:November 09,2004
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