FR545291A - Perforatrice - Google Patents
PerforatriceInfo
- Publication number
- FR545291A FR545291A FR545291DA FR545291A FR 545291 A FR545291 A FR 545291A FR 545291D A FR545291D A FR 545291DA FR 545291 A FR545291 A FR 545291A
- Authority
- FR
- France
- Prior art keywords
- punch
- 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
- 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
- E21D9/1053—Making by using boring or cutting machines for making a slit along the perimeter of the tunnel profile, the remaining core being removed subsequently, e.g. by blasting
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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
HU545291X | 1921-01-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR545291A true FR545291A (fr) | 1922-10-09 |
Family
ID=10979576
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR545291D Expired FR545291A (fr) | 1921-01-07 | 1921-12-28 | Perforatrice |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR545291A (fr) |
-
1921
- 1921-12-28 FR FR545291D patent/FR545291A/fr not_active Expired
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