Matches in Library of Congress for { ?s ?p Drag bits (Drilling and boring) Testing.. }
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- 82600350%2F%2Fr85 subject "Drag bits (Drilling and boring) Testing.".
- 83600092 subject "Drag bits (Drilling and boring) Testing.".
- 83600224 subject "Drag bits (Drilling and boring) Testing.".
- 85600244 subject "Drag bits (Drilling and boring) Testing.".
- 86607930 subject "Drag bits (Drilling and boring) Testing.".
- 87600010 subject "Drag bits (Drilling and boring) Testing.".