4. E - Fixed Constructions
  5. 21
  6. B

Drill tube

E - Fixed Constructions – 21 – B

Patent

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Details

255/43, 255/89

E21B 1/38 (2006.01)

Patent

CA 284573

Bayles Lewis C.

E - Fixed Constructions – 21 – B
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Na

G - Physics – 21 – G
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The Ingersoll-Rand Company

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