FR700520A - Improvements to mechanical backfillers - Google Patents
Improvements to mechanical backfillersInfo
- Publication number
- FR700520A FR700520A FR700520DA FR700520A FR 700520 A FR700520 A FR 700520A FR 700520D A FR700520D A FR 700520DA FR 700520 A FR700520 A FR 700520A
- Authority
- FR
- France
- Prior art keywords
- backfillers
- mechanical
- mechanical backfillers
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/06—Filling-up mechanically
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 |
---|---|---|---|
FR700520T | 1929-11-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR700520A true FR700520A (en) | 1931-03-02 |
Family
ID=9050613
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR700520D Expired FR700520A (en) | 1929-11-25 | 1929-11-25 | Improvements to mechanical backfillers |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR700520A (en) |
-
1929
- 1929-11-25 FR FR700520D patent/FR700520A/en not_active Expired
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