DE291933C - - Google Patents
Info
- Publication number
- DE291933C DE291933C DENDAT291933D DE291933DA DE291933C DE 291933 C DE291933 C DE 291933C DE NDAT291933 D DENDAT291933 D DE NDAT291933D DE 291933D A DE291933D A DE 291933DA DE 291933 C DE291933 C DE 291933C
- Authority
- DE
- Germany
- Prior art keywords
- sleeve
- punch
- connecting sleeve
- hülseriteilen
- sayings
- 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.)
- Active
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/02—Non-telescopic props
- E21D15/04—Non-telescopic props with wooden prop parts joined by double conical connectors
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE291933C true DE291933C (en:Method) |
Family
ID=546762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT291933D Active DE291933C (en:Method) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE291933C (en:Method) |
-
0
- DE DENDAT291933D patent/DE291933C/de active Active
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