JPS60115792A - 掘削ビット - Google Patents
掘削ビットInfo
- Publication number
- JPS60115792A JPS60115792A JP22223683A JP22223683A JPS60115792A JP S60115792 A JPS60115792 A JP S60115792A JP 22223683 A JP22223683 A JP 22223683A JP 22223683 A JP22223683 A JP 22223683A JP S60115792 A JPS60115792 A JP S60115792A
- Authority
- JP
- Japan
- Prior art keywords
- blade
- excavation
- rotation
- reverse rotation
- enlarged
- 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
- Earth Drilling (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22223683A JPS60115792A (ja) | 1983-11-28 | 1983-11-28 | 掘削ビット |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22223683A JPS60115792A (ja) | 1983-11-28 | 1983-11-28 | 掘削ビット |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60115792A true JPS60115792A (ja) | 1985-06-22 |
JPH0379518B2 JPH0379518B2 (lm) | 1991-12-19 |
Family
ID=16779240
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22223683A Granted JPS60115792A (ja) | 1983-11-28 | 1983-11-28 | 掘削ビット |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60115792A (lm) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4969903U (lm) * | 1972-10-02 | 1974-06-18 | ||
JPS5149123A (ja) * | 1974-10-28 | 1976-04-28 | Hitachi Metals Ltd | Funryutaireikyakusochi |
JPS5314481U (lm) * | 1976-07-20 | 1978-02-06 | ||
JPS57193783U (lm) * | 1981-06-04 | 1982-12-08 |
-
1983
- 1983-11-28 JP JP22223683A patent/JPS60115792A/ja active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4969903U (lm) * | 1972-10-02 | 1974-06-18 | ||
JPS5149123A (ja) * | 1974-10-28 | 1976-04-28 | Hitachi Metals Ltd | Funryutaireikyakusochi |
JPS5314481U (lm) * | 1976-07-20 | 1978-02-06 | ||
JPS57193783U (lm) * | 1981-06-04 | 1982-12-08 |
Also Published As
Publication number | Publication date |
---|---|
JPH0379518B2 (lm) | 1991-12-19 |
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