NL80173C - - Google Patents
Info
- Publication number
- NL80173C NL80173C NL80173DA NL80173C NL 80173 C NL80173 C NL 80173C NL 80173D A NL80173D A NL 80173DA NL 80173 C NL80173 C NL 80173C
- Authority
- NL
- Netherlands
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
- E21D17/02—Cantilever extension or similar protecting devices
- E21D17/08—Cap joints for obtaining a coal-face free of pit-props
- E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type
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)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL80173C true NL80173C (en) |
Family
ID=1828515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL80173D NL80173C (en) |
Country Status (1)
| Country | Link |
|---|---|
| NL (1) | NL80173C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3091088A (en) * | 1958-05-30 | 1963-05-28 | Vanwersch Aloys | Support bar for underground workings |
-
0
- NL NL80173D patent/NL80173C/xx active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3091088A (en) * | 1958-05-30 | 1963-05-28 | Vanwersch Aloys | Support bar for underground workings |
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