FR716950A - Method and apparatus for the construction of underground tracks - Google Patents
Method and apparatus for the construction of underground tracksInfo
- Publication number
- FR716950A FR716950A FR716950DA FR716950A FR 716950 A FR716950 A FR 716950A FR 716950D A FR716950D A FR 716950DA FR 716950 A FR716950 A FR 716950A
- Authority
- FR
- France
- Prior art keywords
- construction
- underground tracks
- underground
- tracks
- Prior art date
- 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
- 238000010276 construction Methods 0.000 title 1
- 238000000034 method Methods 0.000 title 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D19/00—Provisional protective covers for working space
- E21D19/04—Provisional protective covers for working space for use in drifting galleries
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE716950X | 1930-05-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR716950A true FR716950A (en) | 1931-12-30 |
Family
ID=6626564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR716950D Expired FR716950A (en) | 1930-05-13 | 1931-05-12 | Method and apparatus for the construction of underground tracks |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR716950A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5155872A (en) * | 1990-10-25 | 1992-10-20 | Aymes Doniel G | Swimming pool with interlocking wall panels and liner-receiving top rail |
-
1931
- 1931-05-12 FR FR716950D patent/FR716950A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5155872A (en) * | 1990-10-25 | 1992-10-20 | Aymes Doniel G | Swimming pool with interlocking wall panels and liner-receiving top rail |
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