JPS62190783U - - Google Patents
Info
- Publication number
- JPS62190783U JPS62190783U JP7976386U JP7976386U JPS62190783U JP S62190783 U JPS62190783 U JP S62190783U JP 7976386 U JP7976386 U JP 7976386U JP 7976386 U JP7976386 U JP 7976386U JP S62190783 U JPS62190783 U JP S62190783U
- Authority
- JP
- Japan
- Prior art keywords
- bump
- protrusion
- bit
- utility
- same direction
- 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
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986079763U JPH04154Y2 (zh) | 1986-05-26 | 1986-05-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986079763U JPH04154Y2 (zh) | 1986-05-26 | 1986-05-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62190783U true JPS62190783U (zh) | 1987-12-04 |
| JPH04154Y2 JPH04154Y2 (zh) | 1992-01-06 |
Family
ID=30929936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986079763U Expired JPH04154Y2 (zh) | 1986-05-26 | 1986-05-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04154Y2 (zh) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4895903A (zh) * | 1972-02-29 | 1973-12-08 |
-
1986
- 1986-05-26 JP JP1986079763U patent/JPH04154Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4895903A (zh) * | 1972-02-29 | 1973-12-08 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04154Y2 (zh) | 1992-01-06 |