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  1. 1

    Lightweight fiberglass feed leg for hand-held pneumatic percussion rock drills / by Spencer, Ellsworth R.

    Published 1985
    Book
  2. 2

    Noise abatement of pneumataic rock drill / by Summers, C. R. (Charles R.)

    Published 1974
    Unknown
  3. 3

    Thermomechanical method for secondary breakage of hard rocks / by Thirumalai, K.

    Published 1975
    Book