PL70887B1 - - Google Patents
Info
- Publication number
- PL70887B1 PL70887B1 PL14930071A PL14930071A PL70887B1 PL 70887 B1 PL70887 B1 PL 70887B1 PL 14930071 A PL14930071 A PL 14930071A PL 14930071 A PL14930071 A PL 14930071A PL 70887 B1 PL70887 B1 PL 70887B1
- Authority
- PL
- Poland
Links
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
- E21D15/50—Component parts or details of props
- E21D15/52—Extensible units located above or below standard props
- E21D15/526—Extensible units located above or below standard props for step-by-step extension of the prop
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)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Earth Drilling (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702039569 DE2039569B2 (de) | 1970-08-08 | 1970-08-08 | Stempelverlaengerungsvorrichtung |
| DE19702051037 DE2051037B2 (de) | 1970-10-17 | 1970-10-17 | Stempelverlaengerungsvorrichtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL70887B1 true PL70887B1 (https=) | 1974-04-30 |
Family
ID=25759563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL14930071A PL70887B1 (https=) | 1970-08-08 | 1971-07-08 |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR2101930A5 (https=) |
| GB (1) | GB1349487A (https=) |
| PL (1) | PL70887B1 (https=) |
-
1971
- 1971-07-08 PL PL14930071A patent/PL70887B1/xx unknown
- 1971-07-27 FR FR7127521A patent/FR2101930A5/fr not_active Expired
- 1971-07-30 GB GB3601971A patent/GB1349487A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1349487A (en) | 1974-04-03 |
| FR2101930A5 (https=) | 1972-03-31 |