DE184371C - - Google Patents
Info
- Publication number
- DE184371C DE184371C DENDAT184371D DE184371DA DE184371C DE 184371 C DE184371 C DE 184371C DE NDAT184371 D DENDAT184371 D DE NDAT184371D DE 184371D A DE184371D A DE 184371DA DE 184371 C DE184371 C DE 184371C
- Authority
- DE
- Germany
- Prior art keywords
- same
- machine
- drilling
- column
- drill
- 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.)
- Active
Links
- 238000005553 drilling Methods 0.000 claims description 9
- 239000011435 rock Substances 0.000 claims description 3
- 241000131971 Bradyrhizobiaceae Species 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/64—Slitting machines guided solely by hand and either carried by hand or mounted on supports
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Earth Drilling (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE184371C true DE184371C (fr) |
Family
ID=448309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT184371D Active DE184371C (fr) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE184371C (fr) |
-
0
- DE DENDAT184371D patent/DE184371C/de active Active
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