BE469913A - - Google Patents
Info
- Publication number
- BE469913A BE469913A BE469913DA BE469913A BE 469913 A BE469913 A BE 469913A BE 469913D A BE469913D A BE 469913DA BE 469913 A BE469913 A BE 469913A
- Authority
- BE
- Belgium
- Prior art keywords
- mobile
- adjustable
- hand
- inclined plane
- effect
- Prior art date
Links
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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
- E21D15/14—Telescopic props
- E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
- E21D15/34—Telescopic props with parts held relatively to each other by friction or gripping by axially- moving balls, rollers, or the like
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)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Casings For Electric Apparatus (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE469913A true BE469913A (enExample) |
Family
ID=120226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE469913D BE469913A (enExample) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE469913A (enExample) |
-
0
- BE BE469913D patent/BE469913A/fr unknown
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