JPH0223090U - - Google Patents
Info
- Publication number
- JPH0223090U JPH0223090U JP9940588U JP9940588U JPH0223090U JP H0223090 U JPH0223090 U JP H0223090U JP 9940588 U JP9940588 U JP 9940588U JP 9940588 U JP9940588 U JP 9940588U JP H0223090 U JPH0223090 U JP H0223090U
- Authority
- JP
- Japan
- Prior art keywords
- pressure chamber
- impact
- chamber
- high pressure
- low
- 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
- 238000005553 drilling Methods 0.000 claims description 9
- 230000035939 shock Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 2
- 238000007599 discharging Methods 0.000 claims 1
- 230000003116 impacting effect Effects 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 2
Landscapes
- Earth Drilling (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9940588U JPH0223090U (cs) | 1988-07-26 | 1988-07-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9940588U JPH0223090U (cs) | 1988-07-26 | 1988-07-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0223090U true JPH0223090U (cs) | 1990-02-15 |
Family
ID=31326533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9940588U Pending JPH0223090U (cs) | 1988-07-26 | 1988-07-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0223090U (cs) |
-
1988
- 1988-07-26 JP JP9940588U patent/JPH0223090U/ja active Pending
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