JPH0426986B2 - - Google Patents
Info
- Publication number
- JPH0426986B2 JPH0426986B2 JP25731287A JP25731287A JPH0426986B2 JP H0426986 B2 JPH0426986 B2 JP H0426986B2 JP 25731287 A JP25731287 A JP 25731287A JP 25731287 A JP25731287 A JP 25731287A JP H0426986 B2 JPH0426986 B2 JP H0426986B2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- bit
- exhaust port
- cylinder
- rock
- 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.)
- Expired
Links
- 239000011435 rock Substances 0.000 claims description 33
- 238000000034 method Methods 0.000 description 10
- 238000009412 basement excavation Methods 0.000 description 3
- 230000001066 destructive effect Effects 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
- Percussive Tools And Related Accessories (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25731287A JPH01103272A (ja) | 1987-10-14 | 1987-10-14 | 空圧式削岩機 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25731287A JPH01103272A (ja) | 1987-10-14 | 1987-10-14 | 空圧式削岩機 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH01103272A JPH01103272A (ja) | 1989-04-20 |
JPH0426986B2 true JPH0426986B2 ( ) | 1992-05-08 |
Family
ID=17304610
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP25731287A Granted JPH01103272A (ja) | 1987-10-14 | 1987-10-14 | 空圧式削岩機 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01103272A ( ) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI115613B (fi) | 2002-05-08 | 2005-06-15 | Sandvik Tamrock Oy | Iskulaite |
JP2007227141A (ja) * | 2006-02-23 | 2007-09-06 | Mitsubishi Cable Ind Ltd | 基板用コネクタの端子構造 |
JP5598651B2 (ja) * | 2009-12-16 | 2014-10-01 | トヨタ自動車株式会社 | ノックアウト装置 |
-
1987
- 1987-10-14 JP JP25731287A patent/JPH01103272A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH01103272A (ja) | 1989-04-20 |
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