JPH01119487U - - Google Patents
Info
- Publication number
- JPH01119487U JPH01119487U JP897088U JP897088U JPH01119487U JP H01119487 U JPH01119487 U JP H01119487U JP 897088 U JP897088 U JP 897088U JP 897088 U JP897088 U JP 897088U JP H01119487 U JPH01119487 U JP H01119487U
- Authority
- JP
- Japan
- Prior art keywords
- tips
- bit
- limestone
- degrees
- rotary 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
- 235000019738 Limestone Nutrition 0.000 claims description 4
- 239000006028 limestone Substances 0.000 claims description 4
- 238000009412 basement excavation Methods 0.000 claims 2
- 238000005553 drilling Methods 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP897088U JPH01119487U (en]) | 1988-01-26 | 1988-01-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP897088U JPH01119487U (en]) | 1988-01-26 | 1988-01-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01119487U true JPH01119487U (en]) | 1989-08-14 |
Family
ID=31215307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP897088U Pending JPH01119487U (en]) | 1988-01-26 | 1988-01-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01119487U (en]) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4838483U (en]) * | 1971-09-10 | 1973-05-12 | ||
| JPS6160235A (ja) * | 1984-08-31 | 1986-03-27 | O S G Kk | 転造成形方法および装置 |
| JPS6253677A (ja) * | 1985-08-31 | 1987-03-09 | カシオ計算機株式会社 | 脈拍計付携帯用小型電子機器 |
| JPS62206191A (ja) * | 1986-03-04 | 1987-09-10 | 三菱マテリアル株式会社 | ボタンビツト |
-
1988
- 1988-01-26 JP JP897088U patent/JPH01119487U/ja active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4838483U (en]) * | 1971-09-10 | 1973-05-12 | ||
| JPS6160235A (ja) * | 1984-08-31 | 1986-03-27 | O S G Kk | 転造成形方法および装置 |
| JPS6253677A (ja) * | 1985-08-31 | 1987-03-09 | カシオ計算機株式会社 | 脈拍計付携帯用小型電子機器 |
| JPS62206191A (ja) * | 1986-03-04 | 1987-09-10 | 三菱マテリアル株式会社 | ボタンビツト |