FR533298A - - Google Patents
Info
- Publication number
- FR533298A FR533298A FR533298DA FR533298A FR 533298 A FR533298 A FR 533298A FR 533298D A FR533298D A FR 533298DA FR 533298 A FR533298 A FR 533298A
- Authority
- FR
- France
- 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
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
- E21D9/106—Making by using boring or cutting machines with percussive tools, e.g. pick-hammers
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR533298A true FR533298A (en) | 1922-02-27 |
Family
ID=1537119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR533298D Expired FR533298A (en) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR533298A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0159135A1 (en) * | 1984-03-12 | 1985-10-23 | Roger Masse | Method and apparatus for drilling hard material |
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0
- FR FR533298D patent/FR533298A/fr not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0159135A1 (en) * | 1984-03-12 | 1985-10-23 | Roger Masse | Method and apparatus for drilling hard material |
| US4682819A (en) * | 1984-03-12 | 1987-07-28 | Roger Masse | Method and apparatus for drilling hard material |