Gaillard Cut, Churn Drills Run by Compressed Air Making Openings for Dynamite Blasts

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Issue Date
2018-11-26
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Keywords
Gaillard Cut , Drill , Dynamite Blasts , Panama Canal , Lantern Slides
Abstract
Panama Canal. Gaillard (Culebra) Cut, Churn Drills Run by Compressed Air Making Openings for Dynamite Blasts.
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