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Description of shaft drilling rack consisting of center column containing air and water manifolds and rack for carrying as many as 12 drills.
Description of shaft drilling rack consisting of center column containing air and water manifolds and rack for carrying as many as 12 drills.
Drilling rack for shaft sinking
Civ Eng (NY)
Marks, S.M. (author)
1938
2 pages
Article (Journal)
English
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| Engineering Index Backfile | 1902
| Tema Archive | 2013
| Engineering Index Backfile | 1948
| Engineering Index Backfile | 1948