JPS5313885B2 - - Google Patents
Info
- Publication number
- JPS5313885B2 JPS5313885B2 JP6620775A JP6620775A JPS5313885B2 JP S5313885 B2 JPS5313885 B2 JP S5313885B2 JP 6620775 A JP6620775 A JP 6620775A JP 6620775 A JP6620775 A JP 6620775A JP S5313885 B2 JPS5313885 B2 JP S5313885B2
- Authority
- JP
- Japan
- 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
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6620775A JPS51141416A (en) | 1975-06-02 | 1975-06-02 | Straight drilling method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6620775A JPS51141416A (en) | 1975-06-02 | 1975-06-02 | Straight drilling method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS51141416A JPS51141416A (en) | 1976-12-06 |
| JPS5313885B2 true JPS5313885B2 (oth) | 1978-05-13 |
Family
ID=13309148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6620775A Granted JPS51141416A (en) | 1975-06-02 | 1975-06-02 | Straight drilling method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS51141416A (oth) |
-
1975
- 1975-06-02 JP JP6620775A patent/JPS51141416A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS51141416A (en) | 1976-12-06 |