FR773629A - - Google Patents
Info
- Publication number
- FR773629A FR773629A FR773629DA FR773629A FR 773629 A FR773629 A FR 773629A FR 773629D A FR773629D A FR 773629DA FR 773629 A FR773629 A FR 773629A
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D1/00—Sinking shafts
- E21D1/03—Sinking shafts mechanically, e.g. by loading shovels or loading buckets, scraping devices, conveying screws
- E21D1/06—Sinking shafts mechanically, e.g. by loading shovels or loading buckets, scraping devices, conveying screws with shaft-boring cutters
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR773629A true FR773629A (zh) | 1934-11-21 |
Family
ID=1552097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR773629D Expired FR773629A (zh) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR773629A (zh) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2822147A (en) * | 1953-06-15 | 1958-02-04 | Allard Pierre Jean-Ma Theodore | Guide device for boring tools |
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0
- FR FR773629D patent/FR773629A/fr not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2822147A (en) * | 1953-06-15 | 1958-02-04 | Allard Pierre Jean-Ma Theodore | Guide device for boring tools |