JPS63201007U - - Google Patents

Info

Publication number
JPS63201007U
JPS63201007U JP9182987U JP9182987U JPS63201007U JP S63201007 U JPS63201007 U JP S63201007U JP 9182987 U JP9182987 U JP 9182987U JP 9182987 U JP9182987 U JP 9182987U JP S63201007 U JPS63201007 U JP S63201007U
Authority
JP
Japan
Prior art keywords
drilling
drill
ring
protrusion
depth
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
JP9182987U
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 JP9182987U priority Critical patent/JPS63201007U/ja
Publication of JPS63201007U publication Critical patent/JPS63201007U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Drilling And Boring (AREA)
JP9182987U 1987-06-15 1987-06-15 Pending JPS63201007U (enrdf_load_stackoverflow)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9182987U JPS63201007U (enrdf_load_stackoverflow) 1987-06-15 1987-06-15

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9182987U JPS63201007U (enrdf_load_stackoverflow) 1987-06-15 1987-06-15

Publications (1)

Publication Number Publication Date
JPS63201007U true JPS63201007U (enrdf_load_stackoverflow) 1988-12-26

Family

ID=30952968

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9182987U Pending JPS63201007U (enrdf_load_stackoverflow) 1987-06-15 1987-06-15

Country Status (1)

Country Link
JP (1) JPS63201007U (enrdf_load_stackoverflow)

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