JPS6129832Y2 - - Google Patents

Info

Publication number
JPS6129832Y2
JPS6129832Y2 JP1979065767U JP6576779U JPS6129832Y2 JP S6129832 Y2 JPS6129832 Y2 JP S6129832Y2 JP 1979065767 U JP1979065767 U JP 1979065767U JP 6576779 U JP6576779 U JP 6576779U JP S6129832 Y2 JPS6129832 Y2 JP S6129832Y2
Authority
JP
Japan
Prior art keywords
core metal
bit
ultra
section
rock cutting
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.)
Expired
Application number
JP1979065767U
Other languages
English (en)
Japanese (ja)
Other versions
JPS55168593U (enrdf_load_stackoverflow
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 JP1979065767U priority Critical patent/JPS6129832Y2/ja
Publication of JPS55168593U publication Critical patent/JPS55168593U/ja
Application granted granted Critical
Publication of JPS6129832Y2 publication Critical patent/JPS6129832Y2/ja
Expired legal-status Critical Current

Links

Landscapes

  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
JP1979065767U 1979-05-18 1979-05-18 Expired JPS6129832Y2 (enrdf_load_stackoverflow)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1979065767U JPS6129832Y2 (enrdf_load_stackoverflow) 1979-05-18 1979-05-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1979065767U JPS6129832Y2 (enrdf_load_stackoverflow) 1979-05-18 1979-05-18

Publications (2)

Publication Number Publication Date
JPS55168593U JPS55168593U (enrdf_load_stackoverflow) 1980-12-03
JPS6129832Y2 true JPS6129832Y2 (enrdf_load_stackoverflow) 1986-09-02

Family

ID=29299764

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1979065767U Expired JPS6129832Y2 (enrdf_load_stackoverflow) 1979-05-18 1979-05-18

Country Status (1)

Country Link
JP (1) JPS6129832Y2 (enrdf_load_stackoverflow)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4373593A (en) * 1979-03-16 1983-02-15 Christensen, Inc. Drill bit

Also Published As

Publication number Publication date
JPS55168593U (enrdf_load_stackoverflow) 1980-12-03

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