JPH0190892U - - Google Patents
Info
- Publication number
- JPH0190892U JPH0190892U JP18529287U JP18529287U JPH0190892U JP H0190892 U JPH0190892 U JP H0190892U JP 18529287 U JP18529287 U JP 18529287U JP 18529287 U JP18529287 U JP 18529287U JP H0190892 U JPH0190892 U JP H0190892U
- Authority
- JP
- Japan
- Prior art keywords
- bit
- casing
- tip
- bit part
- excavation
- 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.)
- Pending
Links
- 238000009412 basement excavation Methods 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims 1
- 230000001681 protective effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18529287U JPH0190892U (it) | 1987-12-03 | 1987-12-03 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18529287U JPH0190892U (it) | 1987-12-03 | 1987-12-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0190892U true JPH0190892U (it) | 1989-06-14 |
Family
ID=31476612
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18529287U Pending JPH0190892U (it) | 1987-12-03 | 1987-12-03 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0190892U (it) |
-
1987
- 1987-12-03 JP JP18529287U patent/JPH0190892U/ja active Pending