BE570620A - - Google Patents
Info
- Publication number
- BE570620A BE570620A BE570620A BE570620A BE570620A BE 570620 A BE570620 A BE 570620A BE 570620 A BE570620 A BE 570620A BE 570620 A BE570620 A BE 570620A BE 570620 A BE570620 A BE 570620A
- Authority
- BE
- Belgium
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
- E21D17/02—Cantilever extension or similar protecting devices
- E21D17/08—Cap joints for obtaining a coal-face free of pit-props
- E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type
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)
- Forklifts And Lifting Vehicles (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2462858A GB848534A (en) | 1958-07-31 | 1958-07-31 | Mine roof bars |
Publications (1)
Publication Number | Publication Date |
---|---|
BE570620A true BE570620A (da) | 1958-09-15 |
Family
ID=10214697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE570620A BE570620A (da) | 1958-07-31 | 1958-08-25 |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE570620A (da) |
FR (1) | FR1210085A (da) |
GB (1) | GB848534A (da) |
-
1958
- 1958-07-31 GB GB2462858A patent/GB848534A/en not_active Expired
- 1958-08-23 FR FR1210085D patent/FR1210085A/fr not_active Expired
- 1958-08-25 BE BE570620A patent/BE570620A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
FR1210085A (fr) | 1960-03-07 |
GB848534A (en) | 1960-09-21 |