FR838335A - Improvement provided in the establishment of pruning retaining timber - Google Patents
Improvement provided in the establishment of pruning retaining timberInfo
- Publication number
- FR838335A FR838335A FR838335DA FR838335A FR 838335 A FR838335 A FR 838335A FR 838335D A FR838335D A FR 838335DA FR 838335 A FR838335 A FR 838335A
- Authority
- FR
- France
- Prior art keywords
- pruning
- establishment
- improvement provided
- timber
- retaining
- 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
- 238000013138 pruning Methods 0.000 title 1
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
- E21D15/002—Auxiliary devices in which the prop type is not essential
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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR838335T | 1938-05-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR838335A true FR838335A (en) | 1939-03-02 |
Family
ID=9299006
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR838335D Expired FR838335A (en) | 1938-05-23 | 1938-05-23 | Improvement provided in the establishment of pruning retaining timber |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR838335A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE760324C (en) * | 1941-07-19 | 1953-01-26 | Franz Berghoff | Method of excavating struts underground using ropes carried by rammers |
DE970192C (en) * | 1952-03-26 | 1958-08-28 | Dr Walther Matthiass | Method and device for mobile longwall mining |
-
1938
- 1938-05-23 FR FR838335D patent/FR838335A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE760324C (en) * | 1941-07-19 | 1953-01-26 | Franz Berghoff | Method of excavating struts underground using ropes carried by rammers |
DE970192C (en) * | 1952-03-26 | 1958-08-28 | Dr Walther Matthiass | Method and device for mobile longwall mining |
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