JPH01121806U - - Google Patents
Info
- Publication number
- JPH01121806U JPH01121806U JP1706388U JP1706388U JPH01121806U JP H01121806 U JPH01121806 U JP H01121806U JP 1706388 U JP1706388 U JP 1706388U JP 1706388 U JP1706388 U JP 1706388U JP H01121806 U JPH01121806 U JP H01121806U
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- polarizing filter
- detection device
- detecting
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 1
Landscapes
- Length Measuring Devices By Optical Means (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1706388U JPH01121806U (no) | 1988-02-12 | 1988-02-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1706388U JPH01121806U (no) | 1988-02-12 | 1988-02-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01121806U true JPH01121806U (no) | 1989-08-18 |
Family
ID=31230532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1706388U Pending JPH01121806U (no) | 1988-02-12 | 1988-02-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01121806U (no) |
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1988
- 1988-02-12 JP JP1706388U patent/JPH01121806U/ja active Pending