JPH01176197U - - Google Patents
Info
- Publication number
- JPH01176197U JPH01176197U JP7204388U JP7204388U JPH01176197U JP H01176197 U JPH01176197 U JP H01176197U JP 7204388 U JP7204388 U JP 7204388U JP 7204388 U JP7204388 U JP 7204388U JP H01176197 U JPH01176197 U JP H01176197U
- Authority
- JP
- Japan
- Prior art keywords
- bit
- cylinder
- excavation head
- outer circumferential
- bit cylinder
- 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.)
- Granted
Links
- 238000005553 drilling Methods 0.000 claims description 2
- 238000009412 basement excavation Methods 0.000 claims 4
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7204388U JPH0630955Y2 (ja) | 1988-05-31 | 1988-05-31 | 掘削装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7204388U JPH0630955Y2 (ja) | 1988-05-31 | 1988-05-31 | 掘削装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01176197U true JPH01176197U (en, 2012) | 1989-12-15 |
| JPH0630955Y2 JPH0630955Y2 (ja) | 1994-08-22 |
Family
ID=31297221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7204388U Expired - Lifetime JPH0630955Y2 (ja) | 1988-05-31 | 1988-05-31 | 掘削装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0630955Y2 (en, 2012) |
-
1988
- 1988-05-31 JP JP7204388U patent/JPH0630955Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0630955Y2 (ja) | 1994-08-22 |