JPH0174198U - - Google Patents

Info

Publication number
JPH0174198U
JPH0174198U JP1987170789U JP17078987U JPH0174198U JP H0174198 U JPH0174198 U JP H0174198U JP 1987170789 U JP1987170789 U JP 1987170789U JP 17078987 U JP17078987 U JP 17078987U JP H0174198 U JPH0174198 U JP H0174198U
Authority
JP
Japan
Prior art keywords
ruler
film
ratio
triangular
diagonal
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
Application number
JP1987170789U
Other languages
English (en)
Japanese (ja)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1987170789U priority Critical patent/JPH0174198U/ja
Publication of JPH0174198U publication Critical patent/JPH0174198U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Drawing Aids And Blackboards (AREA)
JP1987170789U 1987-11-09 1987-11-09 Pending JPH0174198U (US20080094685A1-20080424-C00004.png)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1987170789U JPH0174198U (US20080094685A1-20080424-C00004.png) 1987-11-09 1987-11-09

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987170789U JPH0174198U (US20080094685A1-20080424-C00004.png) 1987-11-09 1987-11-09

Publications (1)

Publication Number Publication Date
JPH0174198U true JPH0174198U (US20080094685A1-20080424-C00004.png) 1989-05-19

Family

ID=31462036

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987170789U Pending JPH0174198U (US20080094685A1-20080424-C00004.png) 1987-11-09 1987-11-09

Country Status (1)

Country Link
JP (1) JPH0174198U (US20080094685A1-20080424-C00004.png)

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