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This system will be undergoing maintenance June 27th between 9:00AM and 12:00PM CDT.

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in subjects: "Drilling and boring machinery"  
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Primary view of Underreamer for Reaming Out Producing-sands.
Lambeth, Acey L.
September 21, 1920
Primary view of Well-Drill Wrench.
Ellinger, William H.
November 8, 1921
Primary view of Drill Bit
Childs, William L.
February 14, 1922
Primary view of Rock-Drill
Alford, Allen
August 16, 1921
Primary view of Reamer.
Hughes, Howard R.
April 23, 1918
Primary view of Reamer.
Humason, Granville A.
April 19, 1921
Primary view of Rotary Earth-Boring Drill.
Suman, John R.
August 23, 1921
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