Very Good, No Highlights or Markup, all pages are intact.Figure 7-23 Cable drill for rock exploration. An efficient crawler-mounted cable drill exploring the site for a proposed trap rock or basalt quarry in northern New Jersey. A 5!/fe-in-diameter hole is ... Engine throttle controls frequency of blows.
Title | : | Excavation Planning Reference Guide |
Author | : | Horace K. Church, Jeremy Robinson |
Publisher | : | - 1988-06-01 |
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