JPH0420669U - - Google Patents
Info
- Publication number
- JPH0420669U JPH0420669U JP1990060523U JP6052390U JPH0420669U JP H0420669 U JPH0420669 U JP H0420669U JP 1990060523 U JP1990060523 U JP 1990060523U JP 6052390 U JP6052390 U JP 6052390U JP H0420669 U JPH0420669 U JP H0420669U
- Authority
- JP
- Japan
- Prior art keywords
- hub
- metal part
- main body
- protective layer
- alignment hole
- 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
- 230000003287 optical effect Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 2
- 239000011241 protective layer Substances 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
- 239000010410 layer Substances 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 description 1
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1990060523U JPH0420669U (zh) | 1990-06-07 | 1990-06-07 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1990060523U JPH0420669U (zh) | 1990-06-07 | 1990-06-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0420669U true JPH0420669U (zh) | 1992-02-20 |
Family
ID=31587960
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1990060523U Pending JPH0420669U (zh) | 1990-06-07 | 1990-06-07 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0420669U (zh) |
-
1990
- 1990-06-07 JP JP1990060523U patent/JPH0420669U/ja active Pending
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