Determination of the angle of internal means of dynamic drilling (Q131987)

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Determination of the angle of internal means of dynamic drilling; 1951; OFR; 51-55-C; Couard, A.; translated by Britt, S. H.
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English
Determination of the angle of internal means of dynamic drilling
Determination of the angle of internal means of dynamic drilling; 1951; OFR; 51-55-C; Couard, A.; translated by Britt, S. H.

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