JPH021993U - - Google Patents
Info
- Publication number
- JPH021993U JPH021993U JP7889088U JP7889088U JPH021993U JP H021993 U JPH021993 U JP H021993U JP 7889088 U JP7889088 U JP 7889088U JP 7889088 U JP7889088 U JP 7889088U JP H021993 U JPH021993 U JP H021993U
- Authority
- JP
- Japan
- Prior art keywords
- reflecting mirror
- focal point
- mirror
- attached
- utility
- 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
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7889088U JPH0635596Y2 (ja) | 1988-06-16 | 1988-06-16 | 指向性受波器 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7889088U JPH0635596Y2 (ja) | 1988-06-16 | 1988-06-16 | 指向性受波器 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH021993U true JPH021993U (fr) | 1990-01-09 |
| JPH0635596Y2 JPH0635596Y2 (ja) | 1994-09-14 |
Family
ID=31303783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7889088U Expired - Lifetime JPH0635596Y2 (ja) | 1988-06-16 | 1988-06-16 | 指向性受波器 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0635596Y2 (fr) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004045314A (ja) * | 2002-07-15 | 2004-02-12 | Railway Technical Res Inst | 集音装置および音波分析システム |
| JP2006153547A (ja) * | 2004-11-26 | 2006-06-15 | Railway Technical Res Inst | 軸箱音測定による鉄道車両用車軸軸受監視システム及びその監視方法 |
-
1988
- 1988-06-16 JP JP7889088U patent/JPH0635596Y2/ja not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004045314A (ja) * | 2002-07-15 | 2004-02-12 | Railway Technical Res Inst | 集音装置および音波分析システム |
| JP2006153547A (ja) * | 2004-11-26 | 2006-06-15 | Railway Technical Res Inst | 軸箱音測定による鉄道車両用車軸軸受監視システム及びその監視方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0635596Y2 (ja) | 1994-09-14 |