JPS61188689U - - Google Patents

Info

Publication number
JPS61188689U
JPS61188689U JP7112685U JP7112685U JPS61188689U JP S61188689 U JPS61188689 U JP S61188689U JP 7112685 U JP7112685 U JP 7112685U JP 7112685 U JP7112685 U JP 7112685U JP S61188689 U JPS61188689 U JP S61188689U
Authority
JP
Japan
Prior art keywords
bit
cutting edge
attached above
circular ring
letter
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
JP7112685U
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 JP7112685U priority Critical patent/JPS61188689U/ja
Publication of JPS61188689U publication Critical patent/JPS61188689U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP7112685U 1985-05-14 1985-05-14 Pending JPS61188689U (US20020051482A1-20020502-M00057.png)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7112685U JPS61188689U (US20020051482A1-20020502-M00057.png) 1985-05-14 1985-05-14

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7112685U JPS61188689U (US20020051482A1-20020502-M00057.png) 1985-05-14 1985-05-14

Publications (1)

Publication Number Publication Date
JPS61188689U true JPS61188689U (US20020051482A1-20020502-M00057.png) 1986-11-25

Family

ID=30608338

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7112685U Pending JPS61188689U (US20020051482A1-20020502-M00057.png) 1985-05-14 1985-05-14

Country Status (1)

Country Link
JP (1) JPS61188689U (US20020051482A1-20020502-M00057.png)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5032485U (US20020051482A1-20020502-M00057.png) * 1973-07-24 1975-04-09

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5032485U (US20020051482A1-20020502-M00057.png) * 1973-07-24 1975-04-09

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